66131654479 has 12 divisors (see below), whose sum is σ = 74380640488. Its totient is φ = 58721549040.

The previous prime is 66131654293. The next prime is 66131654489. The reversal of 66131654479 is 97445613166.

It is not a de Polignac number, because 66131654479 - 2²⁷ = 65997436751 is a prime.

It is a super-2 number, since 2×66131654479² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66131654489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6349944 + ... + 6360349.

Almost surely, 2^66131654479 is an apocalyptic number.

66131654479 is a deficient number, since it is larger than the sum of its proper divisors (8248986009).

66131654479 is a wasteful number, since it uses less digits than its factorization.

66131654479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12710358 (or 12710347 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 52.

The spelling of 66131654479 in words is "sixty-six billion, one hundred thirty-one million, six hundred fifty-four thousand, four hundred seventy-nine".