2646579663 has 160 divisors (see below), whose sum is σ = 5175346176. Its totient is φ = 1309727232.

The previous prime is 2646579587. The next prime is 2646579671. The reversal of 2646579663 is 3669756462.

2646579663 is a `hidden beast` number, since 2 + 6 + 4 + 6 + 579 + 6 + 63 = 666.

It is not a de Polignac number, because 2646579663 - 2¹³ = 2646571471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646599663) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 11358595 + ... + 11358827.

Almost surely, 2^2646579663 is an apocalyptic number.

2646579663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2646579663 is a deficient number, since it is larger than the sum of its proper divisors (2528766513).

2646579663 is a wasteful number, since it uses less digits than its factorization.

2646579663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 346 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The square root of 2646579663 is about 51444.9187286752. The cubic root of 2646579663 is about 1383.2318817294.

The spelling of 2646579663 in words is "two billion, six hundred forty-six million, five hundred seventy-nine thousand, six hundred sixty-three".