66107572 has 12 divisors (see below), whose sum is σ = 115788960. Its totient is φ = 33025016.

The previous prime is 66107551. The next prime is 66107581. The reversal of 66107572 is 27570166.

It is a super-2 number, since 2×66107572² = 8740422151470368, which 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 3 ways as a sum of consecutive naturals, for example, 1528 + ... + 11599.

It is an arithmetic number, because the mean of its divisors is an integer number (9649080).

Almost surely, 2^66107572 is an apocalyptic number.

It is an amenable number.

66107572 is a deficient number, since it is larger than the sum of its proper divisors (49681388).

66107572 is a wasteful number, since it uses less digits than its factorization.

66107572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14390 (or 14388 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 66107572 is about 8130.6563080726. The cubic root of 66107572 is about 404.3434405988.

The spelling of 66107572 in words is "sixty-six million, one hundred seven thousand, five hundred seventy-two".