426222666 has 24 divisors (see below), whose sum is σ = 931659300. Its totient is φ = 140816256.

The previous prime is 426222659. The next prime is 426222697. The reversal of 426222666 is 666222624.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 392872041 + 33350625 = 19821^2 + 5775^2 .

It is a super-2 number, since 2×426222666² = 363331522024295112, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 426222666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102741 + ... + 106808.

Almost surely, 2^426222666 is an apocalyptic number.

426222666 is an abundant number, since it is smaller than the sum of its proper divisors (505436634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

426222666 is a wasteful number, since it uses less digits than its factorization.

426222666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209670 (or 209667 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 426222666 is about 20645.1608373488. The cubic root of 426222666 is about 752.5675945800.

The spelling of 426222666 in words is "four hundred twenty-six million, two hundred twenty-two thousand, six hundred sixty-six".