55166722033817 has 2 divisors, whose sum is σ = 55166722033818. Its totient is φ = 55166722033816.

The previous prime is 55166722033811. The next prime is 55166722033919. The reversal of 55166722033817 is 71833022766155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54295366994521 + 871355039296 = 7368539^2 + 933464^2 .

It is a cyclic number.

It is not a de Polignac number, because 55166722033817 - 2⁸ = 55166722033561 is a prime.

It is not a weakly prime, because it can be changed into another prime (55166722033811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27583361016908 + 27583361016909.

It is an arithmetic number, because the mean of its divisors is an integer number (27583361016909).

Almost surely, 2^{55166722033817} is an apocalyptic number.

It is an amenable number.

55166722033817 is a deficient number, since it is larger than the sum of its proper divisors (1).

55166722033817 is an equidigital number, since it uses as much as digits as its factorization.

55166722033817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 55166722033817 in words is "fifty-five trillion, one hundred sixty-six billion, seven hundred twenty-two million, thirty-three thousand, eight hundred seventeen".