2566406456 has 16 divisors (see below), whose sum is σ = 5065276200. Its totient is φ = 1215666144.

The previous prime is 2566406443. The next prime is 2566406461. The reversal of 2566406456 is 6546046652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 8441975 + ... + 8442278.

Almost surely, 2^2566406456 is an apocalyptic number.

It is an amenable number.

2566406456 is a deficient number, since it is larger than the sum of its proper divisors (2498869744).

2566406456 is a wasteful number, since it uses less digits than its factorization.

2566406456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16884278 (or 16884274 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 2566406456 is about 50659.7123560725. The cubic root of 2566406456 is about 1369.1209406817.

The spelling of 2566406456 in words is "two billion, five hundred sixty-six million, four hundred six thousand, four hundred fifty-six".