667936 has 12 divisors (see below), whose sum is σ = 1315062. Its totient is φ = 333952.

The previous prime is 667921. The next prime is 667949. The reversal of 667936 is 639766.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 59536 = 780^2 + 244^2 .

It is a super-2 number, since 2×667936² = 892277000192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667895 and 667904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10405 + ... + 10468.

2⁶⁶⁷⁹³⁶ is an apocalyptic number.

It is an amenable number.

667936 is a deficient number, since it is larger than the sum of its proper divisors (647126).

667936 is a wasteful number, since it uses less digits than its factorization.

667936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20883 (or 20875 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 667936 is about 817.2735160275. The cubic root of 667936 is about 87.4134545630.

It can be divided in two parts, 66 and 7936, that multiplied together give a triangular number (523776 = T₁₀₂₃).

The spelling of 667936 in words is "six hundred sixty-seven thousand, nine hundred thirty-six".