6659513646 has 16 divisors (see below), whose sum is σ = 13324608000. Its totient is φ = 2218907768.

The previous prime is 6659513599. The next prime is 6659513659. The reversal of 6659513646 is 6463159566.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216936 + ... + 245723.

It is an arithmetic number, because the mean of its divisors is an integer number (832788000).

Almost surely, 2^6659513646 is an apocalyptic number.

6659513646 is an abundant number, since it is smaller than the sum of its proper divisors (6665094354).

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

6659513646 is a wasteful number, since it uses less digits than its factorization.

6659513646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465063.

The product of its digits is 3499200, while the sum is 51.

The square root of 6659513646 is about 81605.8432099075. The cubic root of 6659513646 is about 1881.3986918583.

The spelling of 6659513646 in words is "six billion, six hundred fifty-nine million, five hundred thirteen thousand, six hundred forty-six".