66800206171812 has 96 divisors (see below), whose sum is σ = 159384107151360. Its totient is φ = 21768682700160.

The previous prime is 66800206171799. The next prime is 66800206171847. The reversal of 66800206171812 is 21817160200866.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153087498 + ... + 153523230.

It is an arithmetic number, because the mean of its divisors is an integer number (1660251116160).

Almost surely, 2^{66800206171812} is an apocalyptic number.

It is an amenable number.

66800206171812 is an abundant number, since it is smaller than the sum of its proper divisors (92583900979548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66800206171812 is a wasteful number, since it uses less digits than its factorization.

66800206171812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436993 (or 436991 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 66800206171812 in words is "sixty-six trillion, eight hundred billion, two hundred six million, one hundred seventy-one thousand, eight hundred twelve".