2541291666 has 24 divisors (see below), whose sum is σ = 5313179760. Its totient is φ = 810265896.

The previous prime is 2541291653. The next prime is 2541291703. The reversal of 2541291666 is 6661921452.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397156 + ... + 403503.

It is an arithmetic number, because the mean of its divisors is an integer number (221382490).

Almost surely, 2^2541291666 is an apocalyptic number.

2541291666 is an abundant number, since it is smaller than the sum of its proper divisors (2771888094).

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

2541291666 is a wasteful number, since it uses less digits than its factorization.

2541291666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800710 (or 800687 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 2541291666 is about 50411.2255950994. The cubic root of 2541291666 is about 1364.6402315013.

The spelling of 2541291666 in words is "two billion, five hundred forty-one million, two hundred ninety-one thousand, six hundred sixty-six".