2566266240 has 64 divisors (see below), whose sum is σ = 8179979760. Its totient is φ = 684337152.

The previous prime is 2566266167. The next prime is 2566266247. The reversal of 2566266240 is 426626652.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566266247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666379 + ... + 670218.

Almost surely, 2^2566266240 is an apocalyptic number.

2566266240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566266240 is an abundant number, since it is smaller than the sum of its proper divisors (5613713520).

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

2566266240 is a wasteful number, since it uses less digits than its factorization.

2566266240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336619 (or 1336607 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 2566266240 is about 50658.3284366944. The cubic root of 2566266240 is about 1369.0960061852.

The spelling of 2566266240 in words is "two billion, five hundred sixty-six million, two hundred sixty-six thousand, two hundred forty".