6616101636 has 36 divisors (see below), whose sum is σ = 16872045372. Its totient is φ = 2185849344.

The previous prime is 6616101619. The next prime is 6616101643. The reversal of 6616101636 is 6361016166.

It is a happy number.

6616101636 is a `hidden beast` number, since 6 + 6 + 1 + 6 + 10 + 1 + 636 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2601612036 + 4014489600 = 51006^2 + 63360^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6616101636.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 809121 + ... + 817256.

It is an arithmetic number, because the mean of its divisors is an integer number (468667927).

Almost surely, 2^6616101636 is an apocalyptic number.

It is an amenable number.

6616101636 is an abundant number, since it is smaller than the sum of its proper divisors (10255943736).

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

6616101636 is a wasteful number, since it uses less digits than its factorization.

6616101636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626500 (or 1626495 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 6616101636 is about 81339.4223977525. The cubic root of 6616101636 is about 1877.3016249360.

The spelling of 6616101636 in words is "six billion, six hundred sixteen million, one hundred one thousand, six hundred thirty-six".