66664102431125 has 32 divisors (see below), whose sum is σ = 84284243297280. Its totient is φ = 52638152313600.

The previous prime is 66664102431107. The next prime is 66664102431161. The reversal of 66664102431125 is 52113420146666.

It is not a de Polignac number, because 66664102431125 - 2²² = 66664098236821 is a prime.

It is a super-2 number, since 2×66664102431125² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66664102431125.

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, 6497729 + ... + 13249478.

It is an arithmetic number, because the mean of its divisors is an integer number (2633882603040).

Almost surely, 2^{66664102431125} is an apocalyptic number.

It is an amenable number.

66664102431125 is a deficient number, since it is larger than the sum of its proper divisors (17620140866155).

66664102431125 is a wasteful number, since it uses less digits than its factorization.

66664102431125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19747574 (or 19747564 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 66664102431125 in words is "sixty-six trillion, six hundred sixty-four billion, one hundred two million, four hundred thirty-one thousand, one hundred twenty-five".