665172775248 has 40 divisors (see below), whose sum is σ = 1718406000096. Its totient is φ = 221718710400.

The previous prime is 665172775247. The next prime is 665172775273. The reversal of 665172775248 is 842577271566.

It is a super-2 number, since 2×665172775248² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665172775191 and 665172775200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665172775247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2062038 + ... + 2362698.

Almost surely, 2^665172775248 is an apocalyptic number.

It is an amenable number.

665172775248 is an abundant number, since it is smaller than the sum of its proper divisors (1053233224848).

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

665172775248 is a wasteful number, since it uses less digits than its factorization.

665172775248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346763 (or 346757 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 60.

The spelling of 665172775248 in words is "six hundred sixty-five billion, one hundred seventy-two million, seven hundred seventy-five thousand, two hundred forty-eight".