2566606499 has 2 divisors, whose sum is σ = 2566606500. Its totient is φ = 2566606498.

The previous prime is 2566606463. The next prime is 2566606543. The reversal of 2566606499 is 9946066652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2566606499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2566606499.

It is not a weakly prime, because it can be changed into another prime (2566606429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283303249 + 1283303250.

It is an arithmetic number, because the mean of its divisors is an integer number (1283303250).

Almost surely, 2^2566606499 is an apocalyptic number.

2566606499 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566606499 is an equidigital number, since it uses as much as digits as its factorization.

2566606499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The square root of 2566606499 is about 50661.6866971482. The cubic root of 2566606499 is about 1369.1565125924.

The spelling of 2566606499 in words is "two billion, five hundred sixty-six million, six hundred six thousand, four hundred ninety-nine".