667696 has 20 divisors (see below), whose sum is σ = 1339200. Its totient is φ = 322112.

The previous prime is 667691. The next prime is 667697. The reversal of 667696 is 696766.

It is not an unprimeable number, because it can be changed into a prime (667691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2⁶⁶⁷⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

667696 is an abundant number, since it is smaller than the sum of its proper divisors (671504).

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

667696 is a wasteful number, since it uses less digits than its factorization.

667696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476 (or 1470 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 667696 is about 817.1266731664. The cubic root of 667696 is about 87.4029836285.

The spelling of 667696 in words is "six hundred sixty-seven thousand, six hundred ninety-six".