118661663 has 4 divisors (see below), whose sum is σ = 119458200. Its totient is φ = 117865128.

The previous prime is 118661657. The next prime is 118661671. The reversal of 118661663 is 366166811.

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

It is a cyclic number.

It is not a de Polignac number, because 118661663 - 2¹⁰ = 118660639 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 (118661633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398045 + ... + 398342.

It is an arithmetic number, because the mean of its divisors is an integer number (29864550).

Almost surely, 2^118661663 is an apocalyptic number.

118661663 is a deficient number, since it is larger than the sum of its proper divisors (796537).

118661663 is an equidigital number, since it uses as much as digits as its factorization.

118661663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796536.

The product of its digits is 31104, while the sum is 38.

The square root of 118661663 is about 10893.1934252541. The cubic root of 118661663 is about 491.4018760488.

The spelling of 118661663 in words is "one hundred eighteen million, six hundred sixty-one thousand, six hundred sixty-three".