666794678 has 8 divisors (see below), whose sum is σ = 1091118600. Its totient is φ = 303088480.

The previous prime is 666794671. The next prime is 666794701. The reversal of 666794678 is 876497666.

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 (666794671) 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, 15154403 + ... + 15154446.

It is an arithmetic number, because the mean of its divisors is an integer number (136389825).

Almost surely, 2^666794678 is an apocalyptic number.

666794678 is a deficient number, since it is larger than the sum of its proper divisors (424323922).

666794678 is a wasteful number, since it uses less digits than its factorization.

666794678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30308862.

The product of its digits is 18289152, while the sum is 59.

The square root of 666794678 is about 25822.3677845390. The cubic root of 666794678 is about 873.6363752579.

The spelling of 666794678 in words is "six hundred sixty-six million, seven hundred ninety-four thousand, six hundred seventy-eight".