665617625080 has 32 divisors (see below), whose sum is σ = 1514467076400. Its totient is φ = 263255508736.

The previous prime is 665617625059. The next prime is 665617625081. The reversal of 665617625080 is 80526716566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665617625081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93482062 + ... + 93489181.

Almost surely, 2^665617625080 is an apocalyptic number.

It is an amenable number.

665617625080 is an abundant number, since it is smaller than the sum of its proper divisors (848849451320).

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

665617625080 is a wasteful number, since it uses less digits than its factorization.

665617625080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186971343 (or 186971339 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 665617625080 in words is "six hundred sixty-five billion, six hundred seventeen million, six hundred twenty-five thousand, eighty".