66446272 has 28 divisors (see below), whose sum is σ = 134096760. Its totient is φ = 32658176.

The previous prime is 66446269. The next prime is 66446293. The reversal of 66446272 is 27264466.

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, 5023 + ... + 12574.

It is an arithmetic number, because the mean of its divisors is an integer number (4789170).

Almost surely, 2^66446272 is an apocalyptic number.

It is an amenable number.

66446272 is an abundant number, since it is smaller than the sum of its proper divisors (67650488).

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

66446272 is a wasteful number, since it uses less digits than its factorization.

66446272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17668 (or 17658 counting only the distinct ones).

The product of its digits is 96768, while the sum is 37.

The square root of 66446272 is about 8151.4582744439. The cubic root of 66446272 is about 405.0328114452.

The spelling of 66446272 in words is "sixty-six million, four hundred forty-six thousand, two hundred seventy-two".