55566673333891 has 2 divisors, whose sum is σ = 55566673333892. Its totient is φ = 55566673333890.

The previous prime is 55566673333823. The next prime is 55566673333933. The reversal of 55566673333891 is 19833337666555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55566673333891 - 2¹¹ = 55566673331843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55566673333891.

It is not a weakly prime, because it can be changed into another prime (55566673337891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27783336666945 + 27783336666946.

It is an arithmetic number, because the mean of its divisors is an integer number (27783336666946).

Almost surely, 2^{55566673333891} is an apocalyptic number.

55566673333891 is a deficient number, since it is larger than the sum of its proper divisors (1).

55566673333891 is an equidigital number, since it uses as much as digits as its factorization.

55566673333891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248000, while the sum is 70.

The spelling of 55566673333891 in words is "fifty-five trillion, five hundred sixty-six billion, six hundred seventy-three million, three hundred thirty-three thousand, eight hundred ninety-one".