666420260 has 24 divisors (see below), whose sum is σ = 1526708736. Its totient is φ = 242334560.

The previous prime is 666420211. The next prime is 666420277. The reversal of 666420260 is 62024666.

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 7 ways as a sum of consecutive naturals, for example, 1514372 + ... + 1514811.

It is an arithmetic number, because the mean of its divisors is an integer number (63612864).

Almost surely, 2^666420260 is an apocalyptic number.

It is an amenable number.

666420260 is an abundant number, since it is smaller than the sum of its proper divisors (860288476).

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

666420260 is a wasteful number, since it uses less digits than its factorization.

666420260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029203 (or 3029201 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 666420260 is about 25815.1168891408. The cubic root of 666420260 is about 873.4728234483.

The spelling of 666420260 in words is "six hundred sixty-six million, four hundred twenty thousand, two hundred sixty".