2613663 has 24 divisors (see below), whose sum is σ = 4127760. Its totient is φ = 1584000.

The previous prime is 2613649. The next prime is 2613671. The reversal of 2613663 is 3663162.

It is not a de Polignac number, because 2613663 - 2⁴ = 2613647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2613613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10288 + ... + 10538.

It is an arithmetic number, because the mean of its divisors is an integer number (171990).

2^2613663 is an apocalyptic number.

2613663 is a deficient number, since it is larger than the sum of its proper divisors (1514097).

2613663 is a wasteful number, since it uses less digits than its factorization.

2613663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 356 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 2613663 is about 1616.6827146970. The cubic root of 2613663 is about 137.7473322474.

It can be divided in two parts, 26 and 13663, that added together give a square (13689 = 117²).

The spelling of 2613663 in words is "two million, six hundred thirteen thousand, six hundred sixty-three".