157666865712 has 40 divisors (see below), whose sum is σ = 407841389040. Its totient is φ = 52486548480.

The previous prime is 157666865711. The next prime is 157666865723. The reversal of 157666865712 is 217568666751.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (157666865711) 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, 2121637 + ... + 2194692.

It is an arithmetic number, because the mean of its divisors is an integer number (10196034726).

Almost surely, 2^157666865712 is an apocalyptic number.

157666865712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157666865712 is an abundant number, since it is smaller than the sum of its proper divisors (250174523328).

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

157666865712 is a wasteful number, since it uses less digits than its factorization.

157666865712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317101 (or 4317095 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 60.

The spelling of 157666865712 in words is "one hundred fifty-seven billion, six hundred sixty-six million, eight hundred sixty-five thousand, seven hundred twelve".