426975661 has 16 divisors (see below), whose sum is σ = 506118400. Its totient is φ = 359961840.

The previous prime is 426975649. The next prime is 426975697. The reversal of 426975661 is 166579624.

It is not a de Polignac number, because 426975661 - 2⁵ = 426975629 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 (426975161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10720 + ... + 31126.

It is an arithmetic number, because the mean of its divisors is an integer number (31632400).

Almost surely, 2^426975661 is an apocalyptic number.

It is an amenable number.

426975661 is a deficient number, since it is larger than the sum of its proper divisors (79142739).

426975661 is an equidigital number, since it uses as much as digits as its factorization.

426975661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20489 (or 20475 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 426975661 is about 20663.3893879973. The cubic root of 426975661 is about 753.0105135017.

The spelling of 426975661 in words is "four hundred twenty-six million, nine hundred seventy-five thousand, six hundred sixty-one".