667940074 has 16 divisors (see below), whose sum is σ = 1035025920. Its totient is φ = 322948080.

The previous prime is 667940071. The next prime is 667940107. The reversal of 667940074 is 470049766.

It is a super-2 number, since 2×667940074² = 892287884910250952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 667940074.

It is not an unprimeable number, because it can be changed into a prime (667940071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96667 + ... + 103345.

It is an arithmetic number, because the mean of its divisors is an integer number (64689120).

Almost surely, 2^667940074 is an apocalyptic number.

667940074 is a deficient number, since it is larger than the sum of its proper divisors (367085846).

667940074 is a wasteful number, since it uses less digits than its factorization.

667940074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 667940074 is about 25844.5366373630. The cubic root of 667940074 is about 874.1363228545.

The spelling of 667940074 in words is "six hundred sixty-seven million, nine hundred forty thousand, seventy-four".