666732 has 24 divisors (see below), whose sum is σ = 1697472. Its totient is φ = 202000.

The previous prime is 666727. The next prime is 666733. The reversal of 666732 is 237666.

It is a self number, because there is not a number n which added to its sum of digits gives 666732.

It is not an unprimeable number, because it can be changed into a prime (666733) 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, 2394 + ... + 2657.

It is an arithmetic number, because the mean of its divisors is an integer number (70728).

2⁶⁶⁶⁷³² is an apocalyptic number.

It is an amenable number.

666732 is an abundant number, since it is smaller than the sum of its proper divisors (1030740).

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

666732 is a wasteful number, since it uses less digits than its factorization.

666732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5069 (or 5067 counting only the distinct ones).

The product of its digits is 9072, while the sum is 30.

The square root of 666732 is about 816.5365882800. The cubic root of 666732 is about 87.3609000766.

The spelling of 666732 in words is "six hundred sixty-six thousand, seven hundred thirty-two".