111661005106 has 32 divisors (see below), whose sum is σ = 204685564032. Its totient is φ = 44593785600.

The previous prime is 111661005097. The next prime is 111661005167. The reversal of 111661005106 is 601500166111.

It is a super-3 number, since 3×111661005106³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 2298556 + ... + 2346631.

It is an arithmetic number, because the mean of its divisors is an integer number (6396423876).

Almost surely, 2^111661005106 is an apocalyptic number.

111661005106 is a deficient number, since it is larger than the sum of its proper divisors (93024558926).

111661005106 is a wasteful number, since it uses less digits than its factorization.

111661005106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645314.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 111661005106 in words is "one hundred eleven billion, six hundred sixty-one million, five thousand, one hundred six".