66272688 has 40 divisors (see below), whose sum is σ = 190228400. Its totient is φ = 22090752.

The previous prime is 66272677. The next prime is 66272707. The reversal of 66272688 is 88627266.

It is a happy 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, 76273 + ... + 77136.

It is an arithmetic number, because the mean of its divisors is an integer number (4755710).

Almost surely, 2^66272688 is an apocalyptic number.

It is an amenable number.

66272688 is an abundant number, since it is smaller than the sum of its proper divisors (123955712).

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

66272688 is a wasteful number, since it uses less digits than its factorization.

66272688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153426 (or 153414 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 66272688 is about 8140.8038915085. The cubic root of 66272688 is about 404.6798017836.

The spelling of 66272688 in words is "sixty-six million, two hundred seventy-two thousand, six hundred eighty-eight".