2565166801 has 8 divisors (see below), whose sum is σ = 2700979200. Its totient is φ = 2429434800.

The previous prime is 2565166789. The next prime is 2565166817. The reversal of 2565166801 is 1086615652.

2565166801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2565166801 - 2¹⁹ = 2564642513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2565166831) 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, 52080 + ... + 88558.

It is an arithmetic number, because the mean of its divisors is an integer number (337622400).

Almost surely, 2^2565166801 is an apocalyptic number.

It is an amenable number.

2565166801 is a deficient number, since it is larger than the sum of its proper divisors (135812399).

2565166801 is a wasteful number, since it uses less digits than its factorization.

2565166801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40199.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 2565166801 is about 50647.4757613842. The cubic root of 2565166801 is about 1368.9004623598.

The spelling of 2565166801 in words is "two billion, five hundred sixty-five million, one hundred sixty-six thousand, eight hundred one".