66211925211 has 48 divisors (see below), whose sum is σ = 105125529600. Its totient is φ = 39971200896.

The previous prime is 66211925203. The next prime is 66211925243. The reversal of 66211925211 is 11252911266.

66211925211 is a `hidden beast` number, since 6 + 621 + 1 + 9 + 2 + 5 + 21 + 1 = 666.

It is not a de Polignac number, because 66211925211 - 2³ = 66211925203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66211925251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6322966 + ... + 6333428.

It is an arithmetic number, because the mean of its divisors is an integer number (2190115200).

Almost surely, 2^66211925211 is an apocalyptic number.

66211925211 is a deficient number, since it is larger than the sum of its proper divisors (38913604389).

66211925211 is a wasteful number, since it uses less digits than its factorization.

66211925211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12120 (or 12117 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The spelling of 66211925211 in words is "sixty-six billion, two hundred eleven million, nine hundred twenty-five thousand, two hundred eleven".