1116605661 has 16 divisors (see below), whose sum is σ = 1571927040. Its totient is φ = 703082160.

The previous prime is 1116605629. The next prime is 1116605663. The reversal of 1116605661 is 1665066111.

It is not a de Polignac number, because 1116605661 - 2⁵ = 1116605629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116605663) 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, 10725 + ... + 48458.

It is an arithmetic number, because the mean of its divisors is an integer number (98245440).

Almost surely, 2^1116605661 is an apocalyptic number.

It is an amenable number.

1116605661 is a deficient number, since it is larger than the sum of its proper divisors (455321379).

1116605661 is a wasteful number, since it uses less digits than its factorization.

1116605661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59536.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1116605661 is about 33415.6499413074. The cubic root of 1116605661 is about 1037.4486465316.

The spelling of 1116605661 in words is "one billion, one hundred sixteen million, six hundred five thousand, six hundred sixty-one".