667732 has 12 divisors (see below), whose sum is σ = 1258516. Its totient is φ = 308160.

The previous prime is 667727. The next prime is 667741. The reversal of 667732 is 237766.

It can be written as a sum of positive squares in 2 ways, for example, as 197136 + 470596 = 444^2 + 686^2 .

It is a junction number, because it is equal to n+sod(n) for n = 667694 and 667703.

It is a congruent number.

It is an unprimeable number.

667732 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6369 + ... + 6472.

2⁶⁶⁷⁷³² is an apocalyptic number.

It is an amenable number.

667732 is a deficient number, since it is larger than the sum of its proper divisors (590784).

667732 is a wasteful number, since it uses less digits than its factorization.

667732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12858 (or 12856 counting only the distinct ones).

The product of its digits is 10584, while the sum is 31.

The square root of 667732 is about 817.1487012778. The cubic root of 667732 is about 87.4045544286.

The spelling of 667732 in words is "six hundred sixty-seven thousand, seven hundred thirty-two".