66761139199 has 8 divisors (see below), whose sum is σ = 67465718208. Its totient is φ = 66056893440.

The previous prime is 66761139197. The next prime is 66761139209. The reversal of 66761139199 is 99193116766.

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

It is a cyclic number.

It is not a de Polignac number, because 66761139199 - 2¹ = 66761139197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66761139191) 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, 330234 + ... + 492520.

It is an arithmetic number, because the mean of its divisors is an integer number (8433214776).

Almost surely, 2^66761139199 is an apocalyptic number.

66761139199 is a deficient number, since it is larger than the sum of its proper divisors (704579009).

66761139199 is a wasteful number, since it uses less digits than its factorization.

66761139199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166625.

The product of its digits is 3306744, while the sum is 58.

The spelling of 66761139199 in words is "sixty-six billion, seven hundred sixty-one million, one hundred thirty-nine thousand, one hundred ninety-nine".