667420674 has 16 divisors (see below), whose sum is σ = 1380870720. Its totient is φ = 214802000.

The previous prime is 667420643. The next prime is 667420709. The reversal of 667420674 is 476024766.

It is a super-2 number, since 2×667420674² = 890900712165228552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1917702 + ... + 1918049.

It is an arithmetic number, because the mean of its divisors is an integer number (86304420).

Almost surely, 2^667420674 is an apocalyptic number.

667420674 is an abundant number, since it is smaller than the sum of its proper divisors (713450046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667420674 is a wasteful number, since it uses less digits than its factorization.

667420674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835785.

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 667420674 is about 25834.4861377191. The cubic root of 667420674 is about 873.9096836891.

The spelling of 667420674 in words is "six hundred sixty-seven million, four hundred twenty thousand, six hundred seventy-four".