66271705624 has 32 divisors (see below), whose sum is σ = 127335499200. Its totient is φ = 32316148480.

The previous prime is 66271705553. The next prime is 66271705637. The reversal of 66271705624 is 42650717266.

It is a super-2 number, since 2×66271705624² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925542 + ... + 994570.

It is an arithmetic number, because the mean of its divisors is an integer number (3979234350).

Almost surely, 2^66271705624 is an apocalyptic number.

It is an amenable number.

66271705624 is a deficient number, since it is larger than the sum of its proper divisors (61063793576).

66271705624 is a wasteful number, since it uses less digits than its factorization.

66271705624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72003 (or 71999 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 66271705624 in words is "sixty-six billion, two hundred seventy-one million, seven hundred five thousand, six hundred twenty-four".