118192661 has 4 divisors (see below), whose sum is σ = 122268300. Its totient is φ = 114117024.

The previous prime is 118192649. The next prime is 118192693. The reversal of 118192661 is 166291811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51051025 + 67141636 = 7145^2 + 8194^2 .

It is a cyclic number.

It is not a de Polignac number, because 118192661 - 2¹⁸ = 117930517 is a prime.

It is a super-2 number, since 2×118192661² = 27939010228521842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118192601) 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, 2037776 + ... + 2037833.

It is an arithmetic number, because the mean of its divisors is an integer number (30567075).

Almost surely, 2^118192661 is an apocalyptic number.

It is an amenable number.

118192661 is a deficient number, since it is larger than the sum of its proper divisors (4075639).

118192661 is an equidigital number, since it uses as much as digits as its factorization.

118192661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075638.

The product of its digits is 5184, while the sum is 35.

The square root of 118192661 is about 10871.6448157581. The cubic root of 118192661 is about 490.7536106018.

The spelling of 118192661 in words is "one hundred eighteen million, one hundred ninety-two thousand, six hundred sixty-one".