66000686529 has 4 divisors (see below), whose sum is σ = 88000915376. Its totient is φ = 44000457684.

The previous prime is 66000686513. The next prime is 66000686533. The reversal of 66000686529 is 92568600066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66000686529 - 2⁴ = 66000686513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66000686509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11000114419 + ... + 11000114424.

It is an arithmetic number, because the mean of its divisors is an integer number (22000228844).

Almost surely, 2^66000686529 is an apocalyptic number.

It is an amenable number.

66000686529 is a deficient number, since it is larger than the sum of its proper divisors (22000228847).

66000686529 is a wasteful number, since it uses less digits than its factorization.

66000686529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22000228846.

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 66000686529 in words is "sixty-six billion, six hundred eighty-six thousand, five hundred twenty-nine".