666118536 has 48 divisors (see below), whose sum is σ = 1693270800. Its totient is φ = 218370240.

The previous prime is 666118529. The next prime is 666118559. The reversal of 666118536 is 635811666.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 85575 + ... + 93033.

It is an arithmetic number, because the mean of its divisors is an integer number (35276475).

Almost surely, 2^666118536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666118536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846635400).

666118536 is an abundant number, since it is smaller than the sum of its proper divisors (1027152264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666118536 is a wasteful number, since it uses less digits than its factorization.

666118536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7590 (or 7525 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 666118536 is about 25809.2722873002. The cubic root of 666118536 is about 873.3409809688.

The spelling of 666118536 in words is "six hundred sixty-six million, one hundred eighteen thousand, five hundred thirty-six".