2566423940 has 12 divisors (see below), whose sum is σ = 5389490316. Its totient is φ = 1026569568.

The previous prime is 2566423919. The next prime is 2566423943. The reversal of 2566423940 is 493246652.

It can be written as a sum of positive squares in 2 ways, for example, as 1929669184 + 636754756 = 43928^2 + 25234^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2566423943) by changing a digit.

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, 64160579 + ... + 64160618.

It is an arithmetic number, because the mean of its divisors is an integer number (449124193).

Almost surely, 2^2566423940 is an apocalyptic number.

2566423940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566423940 is an abundant number, since it is smaller than the sum of its proper divisors (2823066376).

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

2566423940 is a wasteful number, since it uses less digits than its factorization.

2566423940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128321206 (or 128321204 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The square root of 2566423940 is about 50659.8849189376. The cubic root of 2566423940 is about 1369.1240497834.

The spelling of 2566423940 in words is "two billion, five hundred sixty-six million, four hundred twenty-three thousand, nine hundred forty".