666636132 has 24 divisors (see below), whose sum is σ = 1565928000. Its totient is φ = 220720096.

The previous prime is 666636127. The next prime is 666636133. The reversal of 666636132 is 231636666.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (666636133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184632 + ... + 188207.

It is an arithmetic number, because the mean of its divisors is an integer number (65247000).

Almost surely, 2^666636132 is an apocalyptic number.

It is an amenable number.

666636132 is an abundant number, since it is smaller than the sum of its proper divisors (899291868).

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

666636132 is a wasteful number, since it uses less digits than its factorization.

666636132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372995 (or 372993 counting only the distinct ones).

The product of its digits is 139968, while the sum is 39.

The square root of 666636132 is about 25819.2976666679. The cubic root of 666636132 is about 873.5671272885.

The spelling of 666636132 in words is "six hundred sixty-six million, six hundred thirty-six thousand, one hundred thirty-two".