66122118812 has 12 divisors (see below), whose sum is σ = 115716999216. Its totient is φ = 33060119040.

The previous prime is 66122118773. The next prime is 66122118847. The reversal of 66122118812 is 21881122166.

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, 62864 + ... + 369047.

It is an arithmetic number, because the mean of its divisors is an integer number (9643083268).

Almost surely, 2^66122118812 is an apocalyptic number.

It is an amenable number.

66122118812 is a deficient number, since it is larger than the sum of its proper divisors (49594880404).

66122118812 is a wasteful number, since it uses less digits than its factorization.

66122118812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470188 (or 470186 counting only the distinct ones).

The product of its digits is 18432, while the sum is 38.

The spelling of 66122118812 in words is "sixty-six billion, one hundred twenty-two million, one hundred eighteen thousand, eight hundred twelve".