116157661 has 4 divisors (see below), whose sum is σ = 116209024. Its totient is φ = 116106300.

The previous prime is 116157649. The next prime is 116157677. The reversal of 116157661 is 166751611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166751611 = 13 ⋅12827047.

It is a cyclic number.

It is not a de Polignac number, because 116157661 - 2⁹ = 116157149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116157611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22125 + ... + 26866.

It is an arithmetic number, because the mean of its divisors is an integer number (29052256).

Almost surely, 2^116157661 is an apocalyptic number.

It is an amenable number.

116157661 is a deficient number, since it is larger than the sum of its proper divisors (51363).

116157661 is an equidigital number, since it uses as much as digits as its factorization.

116157661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51362.

The product of its digits is 7560, while the sum is 34.

The square root of 116157661 is about 10777.6463571598. The cubic root of 116157661 is about 487.9207479582.

The spelling of 116157661 in words is "one hundred sixteen million, one hundred fifty-seven thousand, six hundred sixty-one".