116645661 has 12 divisors (see below), whose sum is σ = 183805440. Its totient is φ = 70694280.

The previous prime is 116645609. The next prime is 116645671. The reversal of 116645661 is 166546611.

It is a happy number.

116645661 is a `hidden beast` number, since 1 + 1 + 6 + 645 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 116645661 - 2⁶ = 116645597 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116645671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 589021 + ... + 589218.

It is an arithmetic number, because the mean of its divisors is an integer number (15317120).

Almost surely, 2^116645661 is an apocalyptic number.

116645661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

116645661 is a deficient number, since it is larger than the sum of its proper divisors (67159779).

116645661 is a wasteful number, since it uses less digits than its factorization.

116645661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178256 (or 1178253 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 116645661 is about 10800.2620801534. The cubic root of 116645661 is about 488.6030753438.

The spelling of 116645661 in words is "one hundred sixteen million, six hundred forty-five thousand, six hundred sixty-one".