6615561106 has 32 divisors (see below), whose sum is σ = 12556634112. Its totient is φ = 2539017360.

The previous prime is 6615561059. The next prime is 6615561149. The reversal of 6615561106 is 6011655166.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310266 + ... + 330901.

It is an arithmetic number, because the mean of its divisors is an integer number (392394816).

Almost surely, 2^6615561106 is an apocalyptic number.

6615561106 is a deficient number, since it is larger than the sum of its proper divisors (5941073006).

6615561106 is a wasteful number, since it uses less digits than its factorization.

6615561106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641254.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 6615561106 is about 81336.0996483111. The cubic root of 6615561106 is about 1877.2504988833.

The spelling of 6615561106 in words is "six billion, six hundred fifteen million, five hundred sixty-one thousand, one hundred six".