121666385676 has 48 divisors (see below), whose sum is σ = 311774803200. Its totient is φ = 36621155520.

The previous prime is 121666385669. The next prime is 121666385707. The reversal of 121666385676 is 676583666121.

It is a super-2 number, since 2×121666385676² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3073336 + ... + 3112671.

It is an arithmetic number, because the mean of its divisors is an integer number (6495308400).

Almost surely, 2^121666385676 is an apocalyptic number.

It is an amenable number.

121666385676 is an abundant number, since it is smaller than the sum of its proper divisors (190108417524).

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

121666385676 is a wasteful number, since it uses less digits than its factorization.

121666385676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6186174 (or 6186172 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 57.

The spelling of 121666385676 in words is "one hundred twenty-one billion, six hundred sixty-six million, three hundred eighty-five thousand, six hundred seventy-six".