666583272 has 48 divisors (see below), whose sum is σ = 1806517440. Its totient is φ = 222048288.

The previous prime is 666583259. The next prime is 666583283. The reversal of 666583272 is 272385666.

It is a happy number.

666583272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209163 + ... + 212325.

It is an arithmetic number, because the mean of its divisors is an integer number (37635780).

Almost surely, 2^666583272 is an apocalyptic number.

It is an amenable number.

666583272 is an abundant number, since it is smaller than the sum of its proper divisors (1139934168).

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

666583272 is a wasteful number, since it uses less digits than its factorization.

666583272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6102 (or 6095 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 666583272 is about 25818.2739934334. The cubic root of 666583272 is about 873.5440372415.

The spelling of 666583272 in words is "six hundred sixty-six million, five hundred eighty-three thousand, two hundred seventy-two".