66200670617 has 4 divisors (see below), whose sum is σ = 66219594000. Its totient is φ = 66181747236.

The previous prime is 66200670607. The next prime is 66200670673. The reversal of 66200670617 is 71607600266.

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 a cyclic number.

It is not a de Polignac number, because 66200670617 - 2⁶ = 66200670553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66200670607) 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, 9456443 + ... + 9463440.

It is an arithmetic number, because the mean of its divisors is an integer number (16554898500).

Almost surely, 2^66200670617 is an apocalyptic number.

It is an amenable number.

66200670617 is a deficient number, since it is larger than the sum of its proper divisors (18923383).

66200670617 is a wasteful number, since it uses less digits than its factorization.

66200670617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18923382.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 66200670617 in words is "sixty-six billion, two hundred million, six hundred seventy thousand, six hundred seventeen".