6615657768 has 32 divisors (see below), whose sum is σ = 16541804160. Its totient is φ = 2204864640.

The previous prime is 6615657733. The next prime is 6615657791. The reversal of 6615657768 is 8677565166.

It is a Smith number, since the sum of its digits (57) 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 7 ways as a sum of consecutive naturals, for example, 161121 + ... + 197967.

It is an arithmetic number, because the mean of its divisors is an integer number (516931380).

Almost surely, 2^6615657768 is an apocalyptic number.

It is an amenable number.

6615657768 is an abundant number, since it is smaller than the sum of its proper divisors (9926146392).

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

6615657768 is a wasteful number, since it uses less digits than its factorization.

6615657768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44337 (or 44333 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The square root of 6615657768 is about 81336.6938595367. The cubic root of 6615657768 is about 1877.2596418671.

The spelling of 6615657768 in words is "six billion, six hundred fifteen million, six hundred fifty-seven thousand, seven hundred sixty-eight".