667981337750 has 128 divisors (see below), whose sum is σ = 1293408829440. Its totient is φ = 258155232000.

The previous prime is 667981337701. The next prime is 667981337761. The reversal of 667981337750 is 57733189766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 614517707 + ... + 614518793.

It is an arithmetic number, because the mean of its divisors is an integer number (10104756480).

Almost surely, 2^667981337750 is an apocalyptic number.

667981337750 is a deficient number, since it is larger than the sum of its proper divisors (625427491690).

667981337750 is a wasteful number, since it uses less digits than its factorization.

667981337750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 62.

The spelling of 667981337750 in words is "six hundred sixty-seven billion, nine hundred eighty-one million, three hundred thirty-seven thousand, seven hundred fifty".