665252792 has 8 divisors (see below), whose sum is σ = 1247349000. Its totient is φ = 332626392.

The previous prime is 665252773. The next prime is 665252831. The reversal of 665252792 is 297252566.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×665252792² = 885122554527590528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41578292 + ... + 41578307.

It is an arithmetic number, because the mean of its divisors is an integer number (155918625).

Almost surely, 2^665252792 is an apocalyptic number.

It is an amenable number.

665252792 is a deficient number, since it is larger than the sum of its proper divisors (582096208).

665252792 is a wasteful number, since it uses less digits than its factorization.

665252792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83156605 (or 83156601 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 665252792 is about 25792.4948773863. The cubic root of 665252792 is about 872.9624609961.

The spelling of 665252792 in words is "six hundred sixty-five million, two hundred fifty-two thousand, seven hundred ninety-two".