166250505623663 has 2 divisors, whose sum is σ = 166250505623664. Its totient is φ = 166250505623662.

The previous prime is 166250505623593. The next prime is 166250505623701. The reversal of 166250505623663 is 366326505052661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166250505623663 - 2³⁴ = 166233325754479 is a prime.

It is a super-3 number, since 3×166250505623663³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166250505623599 and 166250505623608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166250505623863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83125252811831 + 83125252811832.

It is an arithmetic number, because the mean of its divisors is an integer number (83125252811832).

Almost surely, 2^{166250505623663} is an apocalyptic number.

166250505623663 is a deficient number, since it is larger than the sum of its proper divisors (1).

166250505623663 is an equidigital number, since it uses as much as digits as its factorization.

166250505623663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992000, while the sum is 56.

The spelling of 166250505623663 in words is "one hundred sixty-six trillion, two hundred fifty billion, five hundred five million, six hundred twenty-three thousand, six hundred sixty-three".