66326579499 has 16 divisors (see below), whose sum is σ = 93612499200. Its totient is φ = 41700108576.

The previous prime is 66326579497. The next prime is 66326579591. The reversal of 66326579499 is 99497562366.

It is not a de Polignac number, because 66326579499 - 2¹ = 66326579497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66326579497) 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, 8861079 + ... + 8868560.

It is an arithmetic number, because the mean of its divisors is an integer number (5850781200).

Almost surely, 2^66326579499 is an apocalyptic number.

66326579499 is a deficient number, since it is larger than the sum of its proper divisors (27285919701).

66326579499 is a wasteful number, since it uses less digits than its factorization.

66326579499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17729714.

The product of its digits is 132269760, while the sum is 66.

The spelling of 66326579499 in words is "sixty-six billion, three hundred twenty-six million, five hundred seventy-nine thousand, four hundred ninety-nine".