6640602602 has 8 divisors (see below), whose sum is σ = 10230117636. Its totient is φ = 3230563392.

The previous prime is 6640602587. The next prime is 6640602629. The reversal of 6640602602 is 2062060466.

It can be written as a sum of positive squares in 2 ways, for example, as 4405109641 + 2235492961 = 66371^2 + 47281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 44868863 + ... + 44869010.

Almost surely, 2^6640602602 is an apocalyptic number.

6640602602 is a deficient number, since it is larger than the sum of its proper divisors (3589515034).

6640602602 is a wasteful number, since it uses less digits than its factorization.

6640602602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89737912.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 6640602602 is about 81489.8926370627. The cubic root of 6640602602 is about 1879.6161320145.

The spelling of 6640602602 in words is "six billion, six hundred forty million, six hundred two thousand, six hundred two".