666408468 has 36 divisors (see below), whose sum is σ = 1709167040. Its totient is φ = 201941520.

The previous prime is 666408467. The next prime is 666408473. The reversal of 666408468 is 864804666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666408467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228028 + ... + 230931.

Almost surely, 2^666408468 is an apocalyptic number.

It is an amenable number.

666408468 is an abundant number, since it is smaller than the sum of its proper divisors (1042758572).

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

666408468 is a wasteful number, since it uses less digits than its factorization.

666408468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458988 (or 458975 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The square root of 666408468 is about 25814.8884948202. Note that the first 3 decimals coincide. The cubic root of 666408468 is about 873.4676715179.

The spelling of 666408468 in words is "six hundred sixty-six million, four hundred eight thousand, four hundred sixty-eight".