2640002663 has 16 divisors (see below), whose sum is σ = 2738746080. Its totient is φ = 2543458944.

The previous prime is 2640002657. The next prime is 2640002681. The reversal of 2640002663 is 3662000462.

It is a cyclic number.

It is not a de Polignac number, because 2640002663 - 2⁴ = 2640002647 is a prime.

It is a super-2 number, since 2×2640002663² = 13939228121294183138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640002683) 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, 759293 + ... + 762761.

It is an arithmetic number, because the mean of its divisors is an integer number (171171630).

Almost surely, 2^2640002663 is an apocalyptic number.

2640002663 is a deficient number, since it is larger than the sum of its proper divisors (98743417).

2640002663 is a wasteful number, since it uses less digits than its factorization.

2640002663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3778.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 2640002663 is about 51380.9562289376. The cubic root of 2640002663 is about 1382.0851107106.

The spelling of 2640002663 in words is "two billion, six hundred forty million, two thousand, six hundred sixty-three".