667954 has 8 divisors (see below), whose sum is σ = 1145088. Its totient is φ = 286260.

The previous prime is 667949. The next prime is 667963. The reversal of 667954 is 459766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×667954² = 892325092232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23842 + ... + 23869.

It is an arithmetic number, because the mean of its divisors is an integer number (143136).

2⁶⁶⁷⁹⁵⁴ is an apocalyptic number.

667954 is a deficient number, since it is larger than the sum of its proper divisors (477134).

667954 is a wasteful number, since it uses less digits than its factorization.

667954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47720.

The product of its digits is 45360, while the sum is 37.

The square root of 667954 is about 817.2845281785. The cubic root of 667954 is about 87.4142397820.

The spelling of 667954 in words is "six hundred sixty-seven thousand, nine hundred fifty-four".