667720180402 has 32 divisors (see below), whose sum is σ = 1094747581440. Its totient is φ = 302922356880.

The previous prime is 667720180363. The next prime is 667720180447. The reversal of 667720180402 is 204081027766.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25820643 + ... + 25846489.

It is an arithmetic number, because the mean of its divisors is an integer number (34210861920).

Almost surely, 2^667720180402 is an apocalyptic number.

667720180402 is a deficient number, since it is larger than the sum of its proper divisors (427027401038).

667720180402 is a wasteful number, since it uses less digits than its factorization.

667720180402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28086.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 667720180402 in words is "six hundred sixty-seven billion, seven hundred twenty million, one hundred eighty thousand, four hundred two".