667407474726 has 8 divisors (see below), whose sum is σ = 1334814949464. Its totient is φ = 222469158240.

The previous prime is 667407474707. The next prime is 667407474733. The reversal of 667407474726 is 627474704766.

It is a happy number.

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

667407474726 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 667407474726.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55617289555 + ... + 55617289566.

It is an arithmetic number, because the mean of its divisors is an integer number (166851868683).

Almost surely, 2^667407474726 is an apocalyptic number.

667407474726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

667407474726 is a wasteful number, since it uses less digits than its factorization.

667407474726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111234579126.

The product of its (nonzero) digits is 66382848, while the sum is 60.

The spelling of 667407474726 in words is "six hundred sixty-seven billion, four hundred seven million, four hundred seventy-four thousand, seven hundred twenty-six".