6669662459 has 2 divisors, whose sum is σ = 6669662460. Its totient is φ = 6669662458.

The previous prime is 6669662449. The next prime is 6669662491. The reversal of 6669662459 is 9542669666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6669662459 - 2⁸ = 6669662203 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 6669662398 and 6669662407.

It is not a weakly prime, because it can be changed into another prime (6669662449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334831229 + 3334831230.

It is an arithmetic number, because the mean of its divisors is an integer number (3334831230).

Almost surely, 2^6669662459 is an apocalyptic number.

6669662459 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669662459 is an equidigital number, since it uses as much as digits as its factorization.

6669662459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 59.

The square root of 6669662459 is about 81668.0014387520. The cubic root of 6669662459 is about 1882.3539303967.

The spelling of 6669662459 in words is "six billion, six hundred sixty-nine million, six hundred sixty-two thousand, four hundred fifty-nine".