166122231357653 has 2 divisors, whose sum is σ = 166122231357654. Its totient is φ = 166122231357652.

The previous prime is 166122231357617. The next prime is 166122231357697. The reversal of 166122231357653 is 356753132221661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109227539635204 + 56894691722449 = 10451198^2 + 7542857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166122231357653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166122231357595 and 166122231357604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166122231357053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83061115678826 + 83061115678827.

It is an arithmetic number, because the mean of its divisors is an integer number (83061115678827).

Almost surely, 2^{166122231357653} is an apocalyptic number.

It is an amenable number.

166122231357653 is a deficient number, since it is larger than the sum of its proper divisors (1).

166122231357653 is an equidigital number, since it uses as much as digits as its factorization.

166122231357653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 53.

The spelling of 166122231357653 in words is "one hundred sixty-six trillion, one hundred twenty-two billion, two hundred thirty-one million, three hundred fifty-seven thousand, six hundred fifty-three".