665611352 has 64 divisors (see below), whose sum is σ = 1528657920. Its totient is φ = 265465728.

The previous prime is 665611351. The next prime is 665611357. The reversal of 665611352 is 253116566.

665611352 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×665611352² = 886076943822535808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665611351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40673 + ... + 54639.

It is an arithmetic number, because the mean of its divisors is an integer number (23885280).

Almost surely, 2^665611352 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 665611352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764328960).

665611352 is an abundant number, since it is smaller than the sum of its proper divisors (863046568).

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

665611352 is a wasteful number, since it uses less digits than its factorization.

665611352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14040 (or 14036 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 665611352 is about 25799.4448002278. Note that the first 3 decimals coincide. The cubic root of 665611352 is about 873.1192701595.

The spelling of 665611352 in words is "six hundred sixty-five million, six hundred eleven thousand, three hundred fifty-two".