55166550639133 has 2 divisors, whose sum is σ = 55166550639134. Its totient is φ = 55166550639132.

The previous prime is 55166550639113. The next prime is 55166550639157. The reversal of 55166550639133 is 33193605566155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55027124572729 + 139426066404 = 7418027^2 + 373398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55166550639133 is a prime.

It is a super-2 number, since 2×55166550639133² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55166550639113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27583275319566 + 27583275319567.

It is an arithmetic number, because the mean of its divisors is an integer number (27583275319567).

Almost surely, 2^{55166550639133} is an apocalyptic number.

It is an amenable number.

55166550639133 is a deficient number, since it is larger than the sum of its proper divisors (1).

55166550639133 is an equidigital number, since it uses as much as digits as its factorization.

55166550639133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32805000, while the sum is 58.

The spelling of 55166550639133 in words is "fifty-five trillion, one hundred sixty-six billion, five hundred fifty million, six hundred thirty-nine thousand, one hundred thirty-three".