421375568566 has 8 divisors (see below), whose sum is σ = 642425047344. Its totient is φ = 207233886120.

The previous prime is 421375568489. The next prime is 421375568591. The reversal of 421375568566 is 665865573124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 421375568566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726948930 + ... + 1726949173.

It is an arithmetic number, because the mean of its divisors is an integer number (80303130918).

Almost surely, 2^421375568566 is an apocalyptic number.

421375568566 is a deficient number, since it is larger than the sum of its proper divisors (221049478778).

421375568566 is a wasteful number, since it uses less digits than its factorization.

421375568566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453898166.

The product of its digits is 36288000, while the sum is 58.

The spelling of 421375568566 in words is "four hundred twenty-one billion, three hundred seventy-five million, five hundred sixty-eight thousand, five hundred sixty-six".