6615655164 has 36 divisors (see below), whose sum is σ = 16763830720. Its totient is φ = 2199821760.

The previous prime is 6615655157. The next prime is 6615655229. The reversal of 6615655164 is 4615565166.

6615655164 is a `hidden beast` number, since 66 + 15 + 65 + 516 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209932 + ... + 239379.

Almost surely, 2^6615655164 is an apocalyptic number.

It is an amenable number.

6615655164 is an abundant number, since it is smaller than the sum of its proper divisors (10148175556).

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

6615655164 is a wasteful number, since it uses less digits than its factorization.

6615655164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449730 (or 449725 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 6615655164 is about 81336.6778519998. The cubic root of 6615655164 is about 1877.2593955633.

The spelling of 6615655164 in words is "six billion, six hundred fifteen million, six hundred fifty-five thousand, one hundred sixty-four".