426330661 has 4 divisors (see below), whose sum is σ = 426389932. Its totient is φ = 426271392.

The previous prime is 426330623. The next prime is 426330677. The reversal of 426330661 is 166033624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18533025 + 407797636 = 4305^2 + 20194^2 .

It is a cyclic number.

It is not a de Polignac number, because 426330661 - 2¹⁷ = 426199589 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 (421330661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17070 + ... + 33823.

It is an arithmetic number, because the mean of its divisors is an integer number (106597483).

Almost surely, 2^426330661 is an apocalyptic number.

It is an amenable number.

426330661 is a deficient number, since it is larger than the sum of its proper divisors (59271).

426330661 is an equidigital number, since it uses as much as digits as its factorization.

426330661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59270.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 426330661 is about 20647.7761756563. The cubic root of 426330661 is about 752.6311503069.

The spelling of 426330661 in words is "four hundred twenty-six million, three hundred thirty thousand, six hundred sixty-one".