667946794 has 4 divisors (see below), whose sum is σ = 1001920194. Its totient is φ = 333973396.

The previous prime is 667946743. The next prime is 667946803. The reversal of 667946794 is 497649766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 483340225 + 184606569 = 21985^2 + 13587^2 .

It is a super-2 number, since 2×667946794² = 892305839229756872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166986697 + ... + 166986700.

Almost surely, 2^667946794 is an apocalyptic number.

667946794 is a deficient number, since it is larger than the sum of its proper divisors (333973400).

667946794 is a wasteful number, since it uses less digits than its factorization.

667946794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333973399.

The product of its digits is 13716864, while the sum is 58.

The square root of 667946794 is about 25844.6666451707. Note that the first 4 decimals coincide. The cubic root of 667946794 is about 874.1392543432.

The spelling of 667946794 in words is "six hundred sixty-seven million, nine hundred forty-six thousand, seven hundred ninety-four".