55566673333921 has 4 divisors (see below), whose sum is σ = 55815851241472. Its totient is φ = 55317495426372.

The previous prime is 55566673333891. The next prime is 55566673333933. The reversal of 55566673333921 is 12933337666555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55566673333921 - 2⁷ = 55566673333793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55566673333321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124588953441 + ... + 124588953886.

It is an arithmetic number, because the mean of its divisors is an integer number (13953962810368).

Almost surely, 2^{55566673333921} is an apocalyptic number.

It is an amenable number.

55566673333921 is a deficient number, since it is larger than the sum of its proper divisors (249177907551).

55566673333921 is a wasteful number, since it uses less digits than its factorization.

55566673333921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249177907550.

The product of its digits is 275562000, while the sum is 64.

The spelling of 55566673333921 in words is "fifty-five trillion, five hundred sixty-six billion, six hundred seventy-three million, three hundred thirty-three thousand, nine hundred twenty-one".