66057852131 has 4 divisors (see below), whose sum is σ = 66060779664. Its totient is φ = 66054924600.

The previous prime is 66057852127. The next prime is 66057852151. The reversal of 66057852131 is 13125875066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66057852131 - 2² = 66057852127 is a prime.

It is a super-2 number, since 2×66057852131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66057852151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429655 + ... + 1475136.

It is an arithmetic number, because the mean of its divisors is an integer number (16515194916).

Almost surely, 2^66057852131 is an apocalyptic number.

66057852131 is a deficient number, since it is larger than the sum of its proper divisors (2927533).

66057852131 is a wasteful number, since it uses less digits than its factorization.

66057852131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927532.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 66057852131 in words is "sixty-six billion, fifty-seven million, eight hundred fifty-two thousand, one hundred thirty-one".