666512132 has 48 divisors (see below), whose sum is σ = 1450939392. Its totient is φ = 263201280.

The previous prime is 666512131. The next prime is 666512159. The reversal of 666512132 is 231215666.

It is not an unprimeable number, because it can be changed into a prime (666512131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24548 + ... + 43995.

It is an arithmetic number, because the mean of its divisors is an integer number (30227904).

Almost surely, 2^666512132 is an apocalyptic number.

It is an amenable number.

666512132 is an abundant number, since it is smaller than the sum of its proper divisors (784427260).

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

666512132 is a wasteful number, since it uses less digits than its factorization.

666512132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68588 (or 68586 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 666512132 is about 25816.8962503241. The cubic root of 666512132 is about 873.5129602872.

Adding to 666512132 its reverse (231215666), we get a palindrome (897727798).

The spelling of 666512132 in words is "six hundred sixty-six million, five hundred twelve thousand, one hundred thirty-two".