10661556115 has 32 divisors (see below), whose sum is σ = 15110774784. Its totient is φ = 7066725120.

The previous prime is 10661556107. The next prime is 10661556193. The reversal of 10661556115 is 51165516601.

It is not a de Polignac number, because 10661556115 - 2³ = 10661556107 is a prime.

It is a super-2 number, since 2×10661556115² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011402 + ... + 1021888.

It is an arithmetic number, because the mean of its divisors is an integer number (472211712).

Almost surely, 2^10661556115 is an apocalyptic number.

10661556115 is a deficient number, since it is larger than the sum of its proper divisors (4449218669).

10661556115 is a wasteful number, since it uses less digits than its factorization.

10661556115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11467.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 10661556115 in words is "ten billion, six hundred sixty-one million, five hundred fifty-six thousand, one hundred fifteen".