66566305801 has 8 divisors (see below), whose sum is σ = 70308947520. Its totient is φ = 62847579312.

The previous prime is 66566305759. The next prime is 66566305823. The reversal of 66566305801 is 10850366566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66566305801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66566305891) 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, 5973085 + ... + 5984218.

It is an arithmetic number, because the mean of its divisors is an integer number (8788618440).

Almost surely, 2^66566305801 is an apocalyptic number.

It is an amenable number.

66566305801 is a deficient number, since it is larger than the sum of its proper divisors (3742641719).

66566305801 is a wasteful number, since it uses less digits than its factorization.

66566305801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11957615.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 66566305801 in words is "sixty-six billion, five hundred sixty-six million, three hundred five thousand, eight hundred one".