66056006659 has 4 divisors (see below), whose sum is σ = 66697327216. Its totient is φ = 65414686104.

The previous prime is 66056006629. The next prime is 66056006663. The reversal of 66056006659 is 95660065066.

66056006659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66056006659 - 2⁹ = 66056006147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66056006629) 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, 320660124 + ... + 320660329.

It is an arithmetic number, because the mean of its divisors is an integer number (16674331804).

Almost surely, 2^66056006659 is an apocalyptic number.

66056006659 is a deficient number, since it is larger than the sum of its proper divisors (641320557).

66056006659 is a wasteful number, since it uses less digits than its factorization.

66056006659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641320556.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 66056006659 in words is "sixty-six billion, fifty-six million, six thousand, six hundred fifty-nine".