166122231355687 has 2 divisors, whose sum is σ = 166122231355688. Its totient is φ = 166122231355686.

The previous prime is 166122231355631. The next prime is 166122231355699. The reversal of 166122231355687 is 786553132221661.

166122231355687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166122231355687 - 2⁷ = 166122231355559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166122231355627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83061115677843 + 83061115677844.

It is an arithmetic number, because the mean of its divisors is an integer number (83061115677844).

Almost surely, 2^{166122231355687} is an apocalyptic number.

166122231355687 is a deficient number, since it is larger than the sum of its proper divisors (1).

166122231355687 is an equidigital number, since it uses as much as digits as its factorization.

166122231355687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 58.

The spelling of 166122231355687 in words is "one hundred sixty-six trillion, one hundred twenty-two billion, two hundred thirty-one million, three hundred fifty-five thousand, six hundred eighty-seven".