66064040009 has 16 divisors (see below), whose sum is σ = 74762231040. Its totient is φ = 57851664000.

The previous prime is 66064039997. The next prime is 66064040011. The reversal of 66064040009 is 90004046066.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66064040009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66064040039) 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, 891482 + ... + 962739.

It is an arithmetic number, because the mean of its divisors is an integer number (4672639440).

Almost surely, 2^66064040009 is an apocalyptic number.

It is an amenable number.

66064040009 is a deficient number, since it is larger than the sum of its proper divisors (8698191031).

66064040009 is a wasteful number, since it uses less digits than its factorization.

66064040009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854352.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 66064040009 in words is "sixty-six billion, sixty-four million, forty thousand, nine".