667894 has 8 divisors (see below), whose sum is σ = 1011528. Its totient is φ = 330720.

The previous prime is 667883. The next prime is 667903. The reversal of 667894 is 498766.

667894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

667894 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347 + ... + 1774.

It is an arithmetic number, because the mean of its divisors is an integer number (126441).

2⁶⁶⁷⁸⁹⁴ is an apocalyptic number.

667894 is a deficient number, since it is larger than the sum of its proper divisors (343634).

667894 is a wasteful number, since it uses less digits than its factorization.

667894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230.

The product of its digits is 72576, while the sum is 40.

The square root of 667894 is about 817.2478204315. The cubic root of 667894 is about 87.4116223305.

The spelling of 667894 in words is "six hundred sixty-seven thousand, eight hundred ninety-four".