66065999999 has 8 divisors (see below), whose sum is σ = 69209256000. Its totient is φ = 62980418592.

The previous prime is 66065999957. The next prime is 66066000031. The reversal of 66065999999 is 99999956066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66065999999 - 2²⁸ = 65797564543 is a prime.

It is a Duffinian number.

66065999999 is a modest number, since divided by 999999 gives 66065 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66065999599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14416304 + ... + 14420885.

It is an arithmetic number, because the mean of its divisors is an integer number (8651157000).

Almost surely, 2^66065999999 is an apocalyptic number.

66065999999 is a deficient number, since it is larger than the sum of its proper divisors (3143256001).

66065999999 is a wasteful number, since it uses less digits than its factorization.

66065999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28837297.

The product of its (nonzero) digits is 573956280, while the sum is 77.

The spelling of 66065999999 in words is "sixty-six billion, sixty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".