666574272 has 392 divisors, whose sum is σ = 2456399456. Its totient is φ = 174680064.

The previous prime is 666574229. The next prime is 666574303. The reversal of 666574272 is 272475666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4245618 + ... + 4245774.

Almost surely, 2^666574272 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 666574272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1228199728).

666574272 is an abundant number, since it is smaller than the sum of its proper divisors (1789825184).

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

666574272 is a wasteful number, since it uses less digits than its factorization.

666574272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 182 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 666574272 is about 25818.0996976927. The cubic root of 666574272 is about 873.5401057838.

The spelling of 666574272 in words is "six hundred sixty-six million, five hundred seventy-four thousand, two hundred seventy-two".