5661660111015 has 16 divisors (see below), whose sum is σ = 9070559817696. Its totient is φ = 3015584179200.

The previous prime is 5661660111011. The next prime is 5661660111047. The reversal of 5661660111015 is 5101110661665.

It is not a de Polignac number, because 5661660111015 - 2² = 5661660111011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661660111011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247980706 + ... + 248003535.

It is an arithmetic number, because the mean of its divisors is an integer number (566909988606).

Almost surely, 2^{5661660111015} is an apocalyptic number.

5661660111015 is a deficient number, since it is larger than the sum of its proper divisors (3408899706681).

5661660111015 is a wasteful number, since it uses less digits than its factorization.

5661660111015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495985010.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 5661660111015 in words is "five trillion, six hundred sixty-one billion, six hundred sixty million, one hundred eleven thousand, fifteen".