6618071664 has 30 divisors (see below), whose sum is σ = 18521409296. Its totient is φ = 2206023840.

The previous prime is 6618071641. The next prime is 6618071689. The reversal of 6618071664 is 4661708166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22979272 + ... + 22979559.

Almost surely, 2^6618071664 is an apocalyptic number.

It is an amenable number.

6618071664 is an abundant number, since it is smaller than the sum of its proper divisors (11903337632).

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

6618071664 is a wasteful number, since it uses less digits than its factorization.

6618071664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45958845 (or 45958836 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 6618071664 is about 81351.5314176691. The cubic root of 6618071664 is about 1877.4879365514.

The spelling of 6618071664 in words is "six billion, six hundred eighteen million, seventy-one thousand, six hundred sixty-four".