670691186538 has 16 divisors (see below), whose sum is σ = 1341395446080. Its totient is φ = 223561550016.

The previous prime is 670691186447. The next prime is 670691186647. The reversal of 670691186538 is 835681196076.

670691186538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 200706 + ... + 1175442.

It is an arithmetic number, because the mean of its divisors is an integer number (83837215380).

Almost surely, 2^670691186538 is an apocalyptic number.

670691186538 is an abundant number, since it is smaller than the sum of its proper divisors (670704259542).

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

670691186538 is a wasteful number, since it uses less digits than its factorization.

670691186538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089421.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 670691186538 in words is "six hundred seventy billion, six hundred ninety-one million, one hundred eighty-six thousand, five hundred thirty-eight".