66064635507 has 24 divisors (see below), whose sum is σ = 95862720000. Its totient is φ = 40450801248.

The previous prime is 66064635487. The next prime is 66064635509. The reversal of 66064635507 is 70553646066.

It is not a de Polignac number, because 66064635507 - 2⁷ = 66064635379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66064635509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226507 + ... + 428292.

It is an arithmetic number, because the mean of its divisors is an integer number (3994280000).

Almost surely, 2^66064635507 is an apocalyptic number.

66064635507 is a deficient number, since it is larger than the sum of its proper divisors (29798084493).

66064635507 is a wasteful number, since it uses less digits than its factorization.

66064635507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655027 (or 655014 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 66064635507 in words is "sixty-six billion, sixty-four million, six hundred thirty-five thousand, five hundred seven".