66650259499 has 2 divisors, whose sum is σ = 66650259500. Its totient is φ = 66650259498.

The previous prime is 66650259493. The next prime is 66650259523. The reversal of 66650259499 is 99495205666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66650259499 - 2¹¹ = 66650257451 is a prime.

It is not a weakly prime, because it can be changed into another prime (66650259493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33325129749 + 33325129750.

It is an arithmetic number, because the mean of its divisors is an integer number (33325129750).

Almost surely, 2^66650259499 is an apocalyptic number.

66650259499 is a deficient number, since it is larger than the sum of its proper divisors (1).

66650259499 is an equidigital number, since it uses as much as digits as its factorization.

66650259499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31492800, while the sum is 61.

The spelling of 66650259499 in words is "sixty-six billion, six hundred fifty million, two hundred fifty-nine thousand, four hundred ninety-nine".