665600161112 has 32 divisors (see below), whose sum is σ = 1250003190000. Its totient is φ = 332266209408.

The previous prime is 665600161021. The next prime is 665600161123. The reversal of 665600161112 is 211161006566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28300814 + ... + 28324322.

Almost surely, 2^665600161112 is an apocalyptic number.

It is an amenable number.

665600161112 is a deficient number, since it is larger than the sum of its proper divisors (584403028888).

665600161112 is a wasteful number, since it uses less digits than its factorization.

665600161112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29043 (or 29039 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

Adding to 665600161112 its reverse (211161006566), we get a palindrome (876761167678).

The spelling of 665600161112 in words is "six hundred sixty-five billion, six hundred million, one hundred sixty-one thousand, one hundred twelve".