667694 has 8 divisors (see below), whose sum is σ = 1020600. Its totient is φ = 327496.

The previous prime is 667691. The next prime is 667697. The reversal of 667694 is 496766.

It is an interprime number because it is at equal distance from previous prime (667691) and next prime (667697).

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

It is a congruent number.

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, 3044 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (127575).

2⁶⁶⁷⁶⁹⁴ is an apocalyptic number.

667694 is a deficient number, since it is larger than the sum of its proper divisors (352906).

667694 is a wasteful number, since it uses less digits than its factorization.

667694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354.

The product of its digits is 54432, while the sum is 38.

The square root of 667694 is about 817.1254493650. The cubic root of 667694 is about 87.4028963602.

The spelling of 667694 in words is "six hundred sixty-seven thousand, six hundred ninety-four".