66700122057 has 24 divisors (see below), whose sum is σ = 101798109504. Its totient is φ = 43627744368.

The previous prime is 66700122043. The next prime is 66700122059. The reversal of 66700122057 is 75022100766.

It is not a de Polignac number, because 66700122057 - 2¹¹ = 66700120009 is a prime.

It is a super-2 number, since 2×66700122057² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66700122059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2576613 + ... + 2602370.

It is an arithmetic number, because the mean of its divisors is an integer number (4241587896).

Almost surely, 2^66700122057 is an apocalyptic number.

It is an amenable number.

66700122057 is a deficient number, since it is larger than the sum of its proper divisors (35097987447).

66700122057 is an equidigital number, since it uses as much as digits as its factorization.

66700122057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5179051 (or 5179039 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 66700122057 in words is "sixty-six billion, seven hundred million, one hundred twenty-two thousand, fifty-seven".