66682015472 has 20 divisors (see below), whose sum is σ = 134813640720. Its totient is φ = 31891398528.

The previous prime is 66682015469. The next prime is 66682015487. The reversal of 66682015472 is 27451028666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90600197 + ... + 90600932.

It is an arithmetic number, because the mean of its divisors is an integer number (6740682036).

Almost surely, 2^66682015472 is an apocalyptic number.

It is an amenable number.

66682015472 is an abundant number, since it is smaller than the sum of its proper divisors (68131625248).

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

66682015472 is a wasteful number, since it uses less digits than its factorization.

66682015472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181201160 (or 181201154 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 66682015472 in words is "sixty-six billion, six hundred eighty-two million, fifteen thousand, four hundred seventy-two".