421302555666 has 64 divisors (see below), whose sum is σ = 944452915200. Its totient is φ = 139202437248.

The previous prime is 421302555613. The next prime is 421302555677. The reversal of 421302555666 is 666555203124.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7715476 + ... + 7769888.

It is an arithmetic number, because the mean of its divisors is an integer number (14757076800).

Almost surely, 2^421302555666 is an apocalyptic number.

421302555666 is an abundant number, since it is smaller than the sum of its proper divisors (523150359534).

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

421302555666 is a wasteful number, since it uses less digits than its factorization.

421302555666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55680 (or 55674 counting only the distinct ones).

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

The spelling of 421302555666 in words is "four hundred twenty-one billion, three hundred two million, five hundred fifty-five thousand, six hundred sixty-six".