166890103 has 2 divisors, whose sum is σ = 166890104. Its totient is φ = 166890102.

The previous prime is 166890089. The next prime is 166890109. The reversal of 166890103 is 301098661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166890103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166890109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83445051 + 83445052.

It is an arithmetic number, because the mean of its divisors is an integer number (83445052).

Almost surely, 2^166890103 is an apocalyptic number.

166890103 is a deficient number, since it is larger than the sum of its proper divisors (1).

166890103 is an equidigital number, since it uses as much as digits as its factorization.

166890103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 166890103 is about 12918.5952409695. The cubic root of 166890103 is about 550.5670218402.

The spelling of 166890103 in words is "one hundred sixty-six million, eight hundred ninety thousand, one hundred three".