2565667 has 4 divisors (see below), whose sum is σ = 2763040. Its totient is φ = 2368296.

The previous prime is 2565649. The next prime is 2565671. The reversal of 2565667 is 7665652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2565667 - 2¹⁵ = 2532899 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 5 + 6⁴ + 5⁷ + 6⁷ + 6⁸ + 7⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98667 + ... + 98692.

It is an arithmetic number, because the mean of its divisors is an integer number (690760).

2^2565667 is an apocalyptic number.

2565667 is a deficient number, since it is larger than the sum of its proper divisors (197373).

2565667 is a wasteful number, since it uses less digits than its factorization.

2565667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197372.

The product of its digits is 75600, while the sum is 37.

The square root of 2565667 is about 1601.7699585146. The cubic root of 2565667 is about 136.8989433590.

The spelling of 2565667 in words is "two million, five hundred sixty-five thousand, six hundred sixty-seven".