2566406745 has 24 divisors (see below), whose sum is σ = 5083930176. Its totient is φ = 1173214368.

The previous prime is 2566406671. The next prime is 2566406803. The reversal of 2566406745 is 5476046652.

2566406745 is a `hidden beast` number, since 2 + 566 + 40 + 6 + 7 + 45 = 666.

It is not a de Polignac number, because 2566406745 - 2⁹ = 2566406233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2566406745.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4073347 + ... + 4073976.

It is an arithmetic number, because the mean of its divisors is an integer number (211830424).

Almost surely, 2^2566406745 is an apocalyptic number.

It is an amenable number.

2566406745 is a deficient number, since it is larger than the sum of its proper divisors (2517523431).

2566406745 is a wasteful number, since it uses less digits than its factorization.

2566406745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8147341 (or 8147338 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The square root of 2566406745 is about 50659.7152084376. The cubic root of 2566406745 is about 1369.1209920733.

The spelling of 2566406745 in words is "two billion, five hundred sixty-six million, four hundred six thousand, seven hundred forty-five".