66110157822817 has 2 divisors, whose sum is σ = 66110157822818. Its totient is φ = 66110157822816.

The previous prime is 66110157822743. The next prime is 66110157822823. The reversal of 66110157822817 is 71822875101166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43846632779041 + 22263525043776 = 6621679^2 + 4718424^2 .

It is a cyclic number.

It is not a de Polignac number, because 66110157822817 - 2³⁵ = 66075798084449 is a prime.

It is not a weakly prime, because it can be changed into another prime (66110157822847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33055078911408 + 33055078911409.

It is an arithmetic number, because the mean of its divisors is an integer number (33055078911409).

Almost surely, 2^{66110157822817} is an apocalyptic number.

It is an amenable number.

66110157822817 is a deficient number, since it is larger than the sum of its proper divisors (1).

66110157822817 is an equidigital number, since it uses as much as digits as its factorization.

66110157822817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2257920, while the sum is 55.

The spelling of 66110157822817 in words is "sixty-six trillion, one hundred ten billion, one hundred fifty-seven million, eight hundred twenty-two thousand, eight hundred seventeen".