665634829596 has 96 divisors (see below), whose sum is σ = 1783767121920. Its totient is φ = 191064772800.

The previous prime is 665634829579. The next prime is 665634829603. The reversal of 665634829596 is 695928436566.

It is a self number, because there is not a number n which added to its sum of digits gives 665634829596.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24542275 + ... + 24569381.

It is an arithmetic number, because the mean of its divisors is an integer number (18580907520).

Almost surely, 2^665634829596 is an apocalyptic number.

665634829596 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

665634829596 is an abundant number, since it is smaller than the sum of its proper divisors (1118132292324).

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

665634829596 is a wasteful number, since it uses less digits than its factorization.

665634829596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36935 (or 36933 counting only the distinct ones).

The product of its digits is 503884800, while the sum is 69.

The spelling of 665634829596 in words is "six hundred sixty-five billion, six hundred thirty-four million, eight hundred twenty-nine thousand, five hundred ninety-six".