166626278759 has 2 divisors, whose sum is σ = 166626278760. Its totient is φ = 166626278758.

The previous prime is 166626278711. The next prime is 166626278783. The reversal of 166626278759 is 957872626661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166626278759 - 2¹² = 166626274663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166626278695 and 166626278704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166626278459) 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, 83313139379 + 83313139380.

It is an arithmetic number, because the mean of its divisors is an integer number (83313139380).

Almost surely, 2^166626278759 is an apocalyptic number.

166626278759 is a deficient number, since it is larger than the sum of its proper divisors (1).

166626278759 is an equidigital number, since it uses as much as digits as its factorization.

166626278759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 65.

The spelling of 166626278759 in words is "one hundred sixty-six billion, six hundred twenty-six million, two hundred seventy-eight thousand, seven hundred fifty-nine".