666484818 has 32 divisors (see below), whose sum is σ = 1343526912. Its totient is φ = 220410000.

The previous prime is 666484799. The next prime is 666484829. The reversal of 666484818 is 818484666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467655 + ... + 469077.

It is an arithmetic number, because the mean of its divisors is an integer number (41985216).

Almost surely, 2^666484818 is an apocalyptic number.

666484818 is an abundant number, since it is smaller than the sum of its proper divisors (677042094).

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

666484818 is a wasteful number, since it uses less digits than its factorization.

666484818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its digits is 1769472, while the sum is 51.

The square root of 666484818 is about 25816.3672502542. The cubic root of 666484818 is about 873.5010277917.

The spelling of 666484818 in words is "six hundred sixty-six million, four hundred eighty-four thousand, eight hundred eighteen".