118961661 has 32 divisors (see below), whose sum is σ = 199225600. Its totient is φ = 62741952.

The previous prime is 118961629. The next prime is 118961669. The reversal of 118961661 is 166169811.

It is not a de Polignac number, because 118961661 - 2⁵ = 118961629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118961669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8931 + ... + 17823.

It is an arithmetic number, because the mean of its divisors is an integer number (6225800).

Almost surely, 2^118961661 is an apocalyptic number.

It is an amenable number.

118961661 is a deficient number, since it is larger than the sum of its proper divisors (80263939).

118961661 is an equidigital number, since it uses as much as digits as its factorization.

118961661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8930 (or 8916 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 118961661 is about 10906.9547078917. The cubic root of 118961661 is about 491.8156449558.

The spelling of 118961661 in words is "one hundred eighteen million, nine hundred sixty-one thousand, six hundred sixty-one".