6605974664 has 16 divisors (see below), whose sum is σ = 12450382620. Its totient is φ = 3285872640.

The previous prime is 6605974657. The next prime is 6605974673. The reversal of 6605974664 is 4664795066.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6600262564 + 5712100 = 81242^2 + 2390^2 .

It is a super-2 number, since 2×6605974664² = 87277802522819825792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2137697 + ... + 2140784.

Almost surely, 2^6605974664 is an apocalyptic number.

It is an amenable number.

6605974664 is a deficient number, since it is larger than the sum of its proper divisors (5844407956).

6605974664 is a wasteful number, since it uses less digits than its factorization.

6605974664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278680 (or 4278676 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 53.

The square root of 6605974664 is about 81277.1472432442. The cubic root of 6605974664 is about 1876.3433018301.

The spelling of 6605974664 in words is "six billion, six hundred five million, nine hundred seventy-four thousand, six hundred sixty-four".