426668591 has 8 divisors (see below), whose sum is σ = 437621184. Its totient is φ = 415742080.

The previous prime is 426668549. The next prime is 426668609. The reversal of 426668591 is 195866624.

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

It is a cyclic number.

It is not a de Polignac number, because 426668591 - 2¹⁰ = 426667567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426668521) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29066 + ... + 41208.

It is an arithmetic number, because the mean of its divisors is an integer number (54702648).

Almost surely, 2^426668591 is an apocalyptic number.

426668591 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

426668591 is a deficient number, since it is larger than the sum of its proper divisors (10952593).

426668591 is a wasteful number, since it uses less digits than its factorization.

426668591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13041.

The product of its digits is 622080, while the sum is 47.

The square root of 426668591 is about 20655.9577604138. The cubic root of 426668591 is about 752.8299548950.

The spelling of 426668591 in words is "four hundred twenty-six million, six hundred sixty-eight thousand, five hundred ninety-one".