66666606600156 has 24 divisors (see below), whose sum is σ = 155555555307264. Its totient is φ = 22222182213360.

The previous prime is 66666606600107. The next prime is 66666606600161. The reversal of 66666606600156 is 65100660666666.

It is a self number, because there is not a number n which added to its sum of digits gives 66666606600156.

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, 18376701 + ... + 21703371.

It is an arithmetic number, because the mean of its divisors is an integer number (6481481471136).

Almost surely, 2^{66666606600156} is an apocalyptic number.

It is an amenable number.

66666606600156 is an abundant number, since it is smaller than the sum of its proper divisors (88888948707108).

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

66666606600156 is a wasteful number, since it uses less digits than its factorization.

66666606600156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4996681 (or 4996679 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 60.

The spelling of 66666606600156 in words is "sixty-six trillion, six hundred sixty-six billion, six hundred six million, six hundred thousand, one hundred fifty-six".