2611663 has 2 divisors, whose sum is σ = 2611664. Its totient is φ = 2611662.

The previous prime is 2611643. The next prime is 2611667. The reversal of 2611663 is 3661162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2611663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2611667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305831 + 1305832.

It is an arithmetic number, because the mean of its divisors is an integer number (1305832).

2^2611663 is an apocalyptic number.

2611663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2611663 is an equidigital number, since it uses as much as digits as its factorization.

2611663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 2611663 is about 1616.0640457606. The cubic root of 2611663 is about 137.7121880883.

The spelling of 2611663 in words is "two million, six hundred eleven thousand, six hundred sixty-three".