166835168503 has 2 divisors, whose sum is σ = 166835168504. Its totient is φ = 166835168502.

The previous prime is 166835168449. The next prime is 166835168509. The reversal of 166835168503 is 305861538661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166835168503 - 2²¹ = 166833071351 is a prime.

It is a super-2 number, since 2×166835168503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166835168509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83417584251 + 83417584252.

It is an arithmetic number, because the mean of its divisors is an integer number (83417584252).

Almost surely, 2^166835168503 is an apocalyptic number.

166835168503 is a deficient number, since it is larger than the sum of its proper divisors (1).

166835168503 is an equidigital number, since it uses as much as digits as its factorization.

166835168503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 166835168503 in words is "one hundred sixty-six billion, eight hundred thirty-five million, one hundred sixty-eight thousand, five hundred three".