118540665 has 20 divisors (see below), whose sum is σ = 212495844. Its totient is φ = 63221472.

The previous prime is 118540663. The next prime is 118540673. The reversal of 118540665 is 566045811.

It can be written as a sum of positive squares in 2 ways, for example, as 84107241 + 34433424 = 9171^2 + 5868^2 .

It is not a de Polignac number, because 118540665 - 2¹ = 118540663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (118540663) 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 19 ways as a sum of consecutive naturals, for example, 145942 + ... + 146751.

Almost surely, 2^118540665 is an apocalyptic number.

118540665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118540665 is a deficient number, since it is larger than the sum of its proper divisors (93955179).

118540665 is an equidigital number, since it uses as much as digits as its factorization.

118540665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292710 (or 292701 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 118540665 is about 10887.6381736353. The cubic root of 118540665 is about 491.2347935390.

The spelling of 118540665 in words is "one hundred eighteen million, five hundred forty thousand, six hundred sixty-five".