66171268524 has 48 divisors (see below), whose sum is σ = 154974583008. Its totient is φ = 21975034368.

The previous prime is 66171268439. The next prime is 66171268699. The reversal of 66171268524 is 42586217166.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8734002 + ... + 8741574.

It is an arithmetic number, because the mean of its divisors is an integer number (3228637146).

Almost surely, 2^66171268524 is an apocalyptic number.

It is an amenable number.

66171268524 is an abundant number, since it is smaller than the sum of its proper divisors (88803314484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66171268524 is a wasteful number, since it uses less digits than its factorization.

66171268524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10194 (or 10192 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

It can be divided in two parts, 661712 and 68524, that added together give a triangular number (730236 = T₁₂₀₈).

The spelling of 66171268524 in words is "sixty-six billion, one hundred seventy-one million, two hundred sixty-eight thousand, five hundred twenty-four".