426664646426 has 8 divisors (see below), whose sum is σ = 677643850260. Its totient is φ = 200783363008.

The previous prime is 426664646413. The next prime is 426664646453. The reversal of 426664646426 is 624646466624.

It can be written as a sum of positive squares in 2 ways, for example, as 423534132025 + 3130514401 = 650795^2 + 55951^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6274480061 + ... + 6274480128.

Almost surely, 2^426664646426 is an apocalyptic number.

426664646426 is a deficient number, since it is larger than the sum of its proper divisors (250979203834).

426664646426 is a wasteful number, since it uses less digits than its factorization.

426664646426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12548960208.

The product of its digits is 47775744, while the sum is 56.

The spelling of 426664646426 in words is "four hundred twenty-six billion, six hundred sixty-four million, six hundred forty-six thousand, four hundred twenty-six".