66211925212 has 12 divisors (see below), whose sum is σ = 115879441720. Its totient is φ = 33103513296.

The previous prime is 66211925203. The next prime is 66211925243. The reversal of 66211925212 is 21252911266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550818 + ... + 660169.

Almost surely, 2^66211925212 is an apocalyptic number.

It is an amenable number.

66211925212 is a deficient number, since it is larger than the sum of its proper divisors (49667516508).

66211925212 is a wasteful number, since it uses less digits than its factorization.

66211925212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224660 (or 1224658 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The spelling of 66211925212 in words is "sixty-six billion, two hundred eleven million, nine hundred twenty-five thousand, two hundred twelve".