66373594217 has 16 divisors (see below), whose sum is σ = 76000354560. Its totient is φ = 56783135808.

The previous prime is 66373594171. The next prime is 66373594229. The reversal of 66373594217 is 71249537366.

It is not a de Polignac number, because 66373594217 - 2⁸ = 66373593961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66373594117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14183084 + ... + 14187762.

It is an arithmetic number, because the mean of its divisors is an integer number (4750022160).

Almost surely, 2^66373594217 is an apocalyptic number.

It is an amenable number.

66373594217 is a deficient number, since it is larger than the sum of its proper divisors (9626760343).

66373594217 is a wasteful number, since it uses less digits than its factorization.

66373594217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8120.

The product of its digits is 5715360, while the sum is 53.

The spelling of 66373594217 in words is "sixty-six billion, three hundred seventy-three million, five hundred ninety-four thousand, two hundred seventeen".