66244572 has 36 divisors (see below), whose sum is σ = 168015120. Its totient is φ = 22007232.

The previous prime is 66244571. The next prime is 66244579. The reversal of 66244572 is 27544266.

66244572 is a `hidden beast` number, since 66 + 24 + 4 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66244571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8329 + ... + 14207.

Almost surely, 2^66244572 is an apocalyptic number.

It is an amenable number.

66244572 is an abundant number, since it is smaller than the sum of its proper divisors (101770548).

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

66244572 is a wasteful number, since it uses less digits than its factorization.

66244572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202 (or 6197 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 66244572 is about 8139.0768518303. The cubic root of 66244572 is about 404.6225656025.

The spelling of 66244572 in words is "sixty-six million, two hundred forty-four thousand, five hundred seventy-two".