666455562 has 12 divisors (see below), whose sum is σ = 1443987090. Its totient is φ = 222151848.

The previous prime is 666455519. The next prime is 666455593. The reversal of 666455562 is 265554666.

It is a happy number.

666455562 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 658384281 + 8071281 = 25659^2 + 2841^2 .

It is a super-2 number, since 2×666455562² = 888326032241471688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18512637 + ... + 18512672.

Almost surely, 2^666455562 is an apocalyptic number.

666455562 is an abundant number, since it is smaller than the sum of its proper divisors (777531528).

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

666455562 is a wasteful number, since it uses less digits than its factorization.

666455562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37025317 (or 37025314 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The square root of 666455562 is about 25815.8006267480. The cubic root of 666455562 is about 873.4882465454.

It can be divided in two parts, 6664 and 55562, that added together give a palindrome (62226).

The spelling of 666455562 in words is "six hundred sixty-six million, four hundred fifty-five thousand, five hundred sixty-two".