2501663 has 4 divisors (see below), whose sum is σ = 2505048. Its totient is φ = 2498280.

The previous prime is 2501657. The next prime is 2501677. The reversal of 2501663 is 3661052.

2501663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2501663 - 2⁴ = 2501647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56 + ... + 2237.

It is an arithmetic number, because the mean of its divisors is an integer number (626262).

2^2501663 is an apocalyptic number.

2501663 is a deficient number, since it is larger than the sum of its proper divisors (3385).

2501663 is a wasteful number, since it uses less digits than its factorization.

2501663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2501663 is about 1581.6646294332. The cubic root of 2501663 is about 135.7509680027.

The spelling of 2501663 in words is "two million, five hundred one thousand, six hundred sixty-three".