55666941373812 has 48 divisors (see below), whose sum is σ = 134081918738432. Its totient is φ = 17956755894240.

The previous prime is 55666941373793. The next prime is 55666941373829. The reversal of 55666941373812 is 21837314966655.

It is a happy number.

It is a super-2 number, since 2×55666941373812² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19884633 + ... + 22510719.

Almost surely, 2^{55666941373812} is an apocalyptic number.

It is an amenable number.

55666941373812 is an abundant number, since it is smaller than the sum of its proper divisors (78414977364620).

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

55666941373812 is a wasteful number, since it uses less digits than its factorization.

55666941373812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683108 (or 2683106 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 66.

The spelling of 55666941373812 in words is "fifty-five trillion, six hundred sixty-six billion, nine hundred forty-one million, three hundred seventy-three thousand, eight hundred twelve".