666572532 has 36 divisors (see below), whose sum is σ = 1563299136. Its totient is φ = 221057840.

The previous prime is 666572527. The next prime is 666572539. The reversal of 666572532 is 235275666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666572539) 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, 1546357 + ... + 1546787.

It is an arithmetic number, because the mean of its divisors is an integer number (43424976).

Almost surely, 2^666572532 is an apocalyptic number.

It is an amenable number.

666572532 is an abundant number, since it is smaller than the sum of its proper divisors (896726604).

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

666572532 is a wasteful number, since it uses less digits than its factorization.

666572532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 795 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 666572532 is about 25818.0660003804. The cubic root of 666572532 is about 873.5393456979.

It can be divided in two parts, 6665 and 72532, that added together give a palindrome (79197).

The spelling of 666572532 in words is "six hundred sixty-six million, five hundred seventy-two thousand, five hundred thirty-two".