66562972 has 36 divisors (see below), whose sum is σ = 136186680. Its totient is φ = 28383264.

The previous prime is 66562901. The next prime is 66562981. The reversal of 66562972 is 27926566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44143 + ... + 45625.

Almost surely, 2^66562972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66562972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68093340).

66562972 is an abundant number, since it is smaller than the sum of its proper divisors (69623708).

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

66562972 is a wasteful number, since it uses less digits than its factorization.

66562972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730 (or 1721 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 66562972 is about 8158.6133625758. The cubic root of 66562972 is about 405.2697933088.

The spelling of 66562972 in words is "sixty-six million, five hundred sixty-two thousand, nine hundred seventy-two".