55666501505101 has 2 divisors, whose sum is σ = 55666501505102. Its totient is φ = 55666501505100.

The previous prime is 55666501505071. The next prime is 55666501505201. The reversal of 55666501505101 is 10150510566655.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39103148069001 + 16563353436100 = 6253251^2 + 4069810^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666501505101 - 2⁷ = 55666501504973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55666501505201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833250752550 + 27833250752551.

It is an arithmetic number, because the mean of its divisors is an integer number (27833250752551).

Almost surely, 2^{55666501505101} is an apocalyptic number.

It is an amenable number.

55666501505101 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666501505101 is an equidigital number, since it uses as much as digits as its factorization.

55666501505101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 55666501505101 in words is "fifty-five trillion, six hundred sixty-six billion, five hundred one million, five hundred five thousand, one hundred one".