426331566 has 16 divisors (see below), whose sum is σ = 947403600. Its totient is φ = 142110504.

The previous prime is 426331547. The next prime is 426331573. The reversal of 426331566 is 665133624.

426331566 is a `hidden beast` number, since 4 + 2 + 63 + 31 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 426331566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3947461 + ... + 3947568.

It is an arithmetic number, because the mean of its divisors is an integer number (59212725).

Almost surely, 2^426331566 is an apocalyptic number.

426331566 is an abundant number, since it is smaller than the sum of its proper divisors (521072034).

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

426331566 is a wasteful number, since it uses less digits than its factorization.

426331566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895040 (or 7895034 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 426331566 is about 20647.7980908377. The cubic root of 426331566 is about 752.6316828596.

The spelling of 426331566 in words is "four hundred twenty-six million, three hundred thirty-one thousand, five hundred sixty-six".