66670800808139 has 4 divisors (see below), whose sum is σ = 72731782699800. Its totient is φ = 60609818916480.

The previous prime is 66670800808099. The next prime is 66670800808163. The reversal of 66670800808139 is 93180800807666.

It is a happy number.

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 66670800808139 - 2²⁴ = 66670784030923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66670800808639) 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, 3030490945814 + ... + 3030490945835.

It is an arithmetic number, because the mean of its divisors is an integer number (18182945674950).

Almost surely, 2^{66670800808139} is an apocalyptic number.

66670800808139 is a deficient number, since it is larger than the sum of its proper divisors (6060981891661).

66670800808139 is a wasteful number, since it uses less digits than its factorization.

66670800808139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060981891660.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 66670800808139 in words is "sixty-six trillion, six hundred seventy billion, eight hundred million, eight hundred eight thousand, one hundred thirty-nine".