166838501 has 2 divisors, whose sum is σ = 166838502. Its totient is φ = 166838500.

The previous prime is 166838467. The next prime is 166838519. The reversal of 166838501 is 105838661.

It is a happy number.

166838501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 71385601 = 9770^2 + 8449^2 .

It is a cyclic number.

It is not a de Polignac number, because 166838501 - 2⁶ = 166838437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166838101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83419250 + 83419251.

It is an arithmetic number, because the mean of its divisors is an integer number (83419251).

Almost surely, 2^166838501 is an apocalyptic number.

It is an amenable number.

166838501 is a deficient number, since it is larger than the sum of its proper divisors (1).

166838501 is an equidigital number, since it uses as much as digits as its factorization.

166838501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 166838501 is about 12916.5978879889. The cubic root of 166838501 is about 550.5102713447.

The spelling of 166838501 in words is "one hundred sixty-six million, eight hundred thirty-eight thousand, five hundred one".