670718218664 has 48 divisors (see below), whose sum is σ = 1365428166300. Its totient is φ = 308732097024.

The previous prime is 670718218633. The next prime is 670718218691. The reversal of 670718218664 is 466812817076.

It is a happy number.

670718218664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 281704054564 + 389014164100 = 530758^2 + 623710^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160709 + ... + 1169300.

Almost surely, 2^670718218664 is an apocalyptic number.

It is an amenable number.

670718218664 is an abundant number, since it is smaller than the sum of its proper divisors (694709947636).

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

670718218664 is a wasteful number, since it uses less digits than its factorization.

670718218664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330414 (or 1330397 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 670718218664 in words is "six hundred seventy billion, seven hundred eighteen million, two hundred eighteen thousand, six hundred sixty-four".