115101661 has 4 divisors (see below), whose sum is σ = 116488512. Its totient is φ = 113714812.

The previous prime is 115101647. The next prime is 115101739. The reversal of 115101661 is 166101511.

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.

It is a cyclic number.

It is not a de Polignac number, because 115101661 - 2⁵ = 115101629 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 (115101631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693301 + ... + 693466.

It is an arithmetic number, because the mean of its divisors is an integer number (29122128).

Almost surely, 2^115101661 is an apocalyptic number.

It is an amenable number.

115101661 is a deficient number, since it is larger than the sum of its proper divisors (1386851).

115101661 is an equidigital number, since it uses as much as digits as its factorization.

115101661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386850.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 115101661 is about 10728.5442162485. The cubic root of 115101661 is about 486.4376670684.

The spelling of 115101661 in words is "one hundred fifteen million, one hundred one thousand, six hundred sixty-one".