426642364665 has 24 divisors (see below), whose sum is σ = 806741926848. Its totient is φ = 206856903840.

The previous prime is 426642364649. The next prime is 426642364697. The reversal of 426642364665 is 566463246624.

426642364665 is a `hidden beast` number, since 42 + 66 + 423 + 64 + 6 + 65 = 666.

It is not a de Polignac number, because 426642364665 - 2⁴ = 426642364649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 430951389 + ... + 430952378.

It is an arithmetic number, because the mean of its divisors is an integer number (33614246952).

Almost surely, 2^426642364665 is an apocalyptic number.

426642364665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

426642364665 is a deficient number, since it is larger than the sum of its proper divisors (380099562183).

426642364665 is a wasteful number, since it uses less digits than its factorization.

426642364665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861903789 (or 861903786 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 54.

The spelling of 426642364665 in words is "four hundred twenty-six billion, six hundred forty-two million, three hundred sixty-four thousand, six hundred sixty-five".