66879759024015 has 64 divisors (see below), whose sum is σ = 128035700352000. Its totient is φ = 29163687081984.

The previous prime is 66879759023999. The next prime is 66879759024019. The reversal of 66879759024015 is 51042095797866.

It is not a de Polignac number, because 66879759024015 - 2⁴ = 66879759023999 is a prime.

It is a super-2 number, since 2×66879759024015² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66879759024019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 132059290 + ... + 132564759.

It is an arithmetic number, because the mean of its divisors is an integer number (2000557818000).

Almost surely, 2^{66879759024015} is an apocalyptic number.

66879759024015 is a deficient number, since it is larger than the sum of its proper divisors (61155941327985).

66879759024015 is a wasteful number, since it uses less digits than its factorization.

66879759024015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264624176.

The product of its (nonzero) digits is 228614400, while the sum is 69.

The spelling of 66879759024015 in words is "sixty-six trillion, eight hundred seventy-nine billion, seven hundred fifty-nine million, twenty-four thousand, fifteen".