665367552 has 264 divisors, whose sum is σ = 2079489984. Its totient is φ = 204374016.

The previous prime is 665367551. The next prime is 665367569. The reversal of 665367552 is 255763566.

665367552 is a `hidden beast` number, since 6 + 65 + 36 + 7 + 552 = 666.

It is a super-3 number, since 3×665367552³ (a number of 27 digits) contains 333 as substring.

Its product of digits (1134000) is a multiple of the sum of its prime divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 665367498 and 665367507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665367551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9114588 + ... + 9114660.

It is an arithmetic number, because the mean of its divisors is an integer number (7876856).

Almost surely, 2^665367552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665367552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039744992).

665367552 is an abundant number, since it is smaller than the sum of its proper divisors (1414122432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665367552 is a wasteful number, since it uses less digits than its factorization.

665367552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 144 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 45.

The square root of 665367552 is about 25794.7194596103. The cubic root of 665367552 is about 873.0126551544.

It can be divided in two parts, 66536 and 7552, that added together give a cube (74088 = 42³).

The spelling of 665367552 in words is "six hundred sixty-five million, three hundred sixty-seven thousand, five hundred fifty-two".