2553663 has 16 divisors (see below), whose sum is σ = 3914240. Its totient is φ = 1450656.

The previous prime is 2553659. The next prime is 2553671. The reversal of 2553663 is 3663552.

It is not a de Polignac number, because 2553663 - 2² = 2553659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2553663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2554663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5598 + ... + 6036.

It is an arithmetic number, because the mean of its divisors is an integer number (244640).

2^2553663 is an apocalyptic number.

2553663 is a deficient number, since it is larger than the sum of its proper divisors (1360577).

2553663 is a wasteful number, since it uses less digits than its factorization.

2553663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 16200, while the sum is 30.

The square root of 2553663 is about 1598.0184604691. The cubic root of 2553663 is about 136.6851062435.

The spelling of 2553663 in words is "two million, five hundred fifty-three thousand, six hundred sixty-three".