118661657 has 2 divisors, whose sum is σ = 118661658. Its totient is φ = 118661656.

The previous prime is 118661633. The next prime is 118661671. The reversal of 118661657 is 756166811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96609241 + 22052416 = 9829^2 + 4696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118661657 is a prime.

It is not a weakly prime, because it can be changed into another prime (118661677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59330828 + 59330829.

It is an arithmetic number, because the mean of its divisors is an integer number (59330829).

Almost surely, 2^118661657 is an apocalyptic number.

It is an amenable number.

118661657 is a deficient number, since it is larger than the sum of its proper divisors (1).

118661657 is an equidigital number, since it uses as much as digits as its factorization.

118661657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 118661657 is about 10893.1931498528. The cubic root of 118661657 is about 491.4018677664.

It can be divided in two parts, 11 and 8661657, that added together give a palindrome (8661668).

The spelling of 118661657 in words is "one hundred eighteen million, six hundred sixty-one thousand, six hundred fifty-seven".