2566345220 has 24 divisors (see below), whose sum is σ = 5469765504. Its totient is φ = 1011216096.

The previous prime is 2566345207. The next prime is 2566345231. The reversal of 2566345220 is 225436652.

It is a super-2 number, since 2×2566345220² = 13172255576433696800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956252 + ... + 958931.

It is an arithmetic number, because the mean of its divisors is an integer number (227906896).

Almost surely, 2^2566345220 is an apocalyptic number.

2566345220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566345220 is an abundant number, since it is smaller than the sum of its proper divisors (2903420284).

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

2566345220 is a wasteful number, since it uses less digits than its factorization.

2566345220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915259 (or 1915257 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 2566345220 is about 50659.1079668800. The cubic root of 2566345220 is about 1369.1100512456.

The spelling of 2566345220 in words is "two billion, five hundred sixty-six million, three hundred forty-five thousand, two hundred twenty".