6616610685 has 16 divisors (see below), whose sum is σ = 11762863680. Its totient is φ = 3528858960.

The previous prime is 6616610659. The next prime is 6616610699. The reversal of 6616610685 is 5860166166.

It is not a de Polignac number, because 6616610685 - 2⁶ = 6616610621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6616610685.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24505831 + ... + 24506100.

It is an arithmetic number, because the mean of its divisors is an integer number (735178980).

Almost surely, 2^6616610685 is an apocalyptic number.

It is an amenable number.

6616610685 is a deficient number, since it is larger than the sum of its proper divisors (5146252995).

6616610685 is a wasteful number, since it uses less digits than its factorization.

6616610685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49011945 (or 49011939 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 6616610685 is about 81342.5515028881. The cubic root of 6616610685 is about 1877.3497708110.

The spelling of 6616610685 in words is "six billion, six hundred sixteen million, six hundred ten thousand, six hundred eighty-five".