6606642564 has 18 divisors (see below), whose sum is σ = 16700124350. Its totient is φ = 2202214176.

The previous prime is 6606642541. The next prime is 6606642577. The reversal of 6606642564 is 4652466066.

It can be written as a sum of positive squares in only one way, i.e., 6020518464 + 586124100 = 77592^2 + 24210^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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, 91758889 + ... + 91758960.

Almost surely, 2^6606642564 is an apocalyptic number.

It is an amenable number.

6606642564 is an abundant number, since it is smaller than the sum of its proper divisors (10093481786).

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

6606642564 is a wasteful number, since it uses less digits than its factorization.

6606642564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183517859 (or 183517854 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The square root of 6606642564 is about 81281.2559204150. The cubic root of 6606642564 is about 1876.4065358731.

The spelling of 6606642564 in words is "six billion, six hundred six million, six hundred forty-two thousand, five hundred sixty-four".