426550143425666 has 12 divisors (see below), whose sum is σ = 692828487399042. Its totient is φ = 196869296965536.

The previous prime is 426550143425657. The next prime is 426550143425711. The reversal of 426550143425666 is 666524341055624.

It can be written as a sum of positive squares in 3 ways, for example, as 237421225093441 + 189128918332225 = 15408479^2 + 13752415^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 630991336091 + ... + 630991336766.

Almost surely, 2^{426550143425666} is an apocalyptic number.

426550143425666 is a deficient number, since it is larger than the sum of its proper divisors (266278343973376).

426550143425666 is a wasteful number, since it uses less digits than its factorization.

426550143425666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261982672885 (or 1261982672872 counting only the distinct ones).

The product of its (nonzero) digits is 124416000, while the sum is 59.

The spelling of 426550143425666 in words is "four hundred twenty-six trillion, five hundred fifty billion, one hundred forty-three million, four hundred twenty-five thousand, six hundred sixty-six".