166888829 has 2 divisors, whose sum is σ = 166888830. Its totient is φ = 166888828.

The previous prime is 166888807. The next prime is 166888831. The reversal of 166888829 is 928888661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148596100 + 18292729 = 12190^2 + 4277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166888829 is a prime.

Together with 166888831, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166888849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83444414 + 83444415.

It is an arithmetic number, because the mean of its divisors is an integer number (83444415).

Almost surely, 2^166888829 is an apocalyptic number.

It is an amenable number.

166888829 is a deficient number, since it is larger than the sum of its proper divisors (1).

166888829 is an equidigital number, since it uses as much as digits as its factorization.

166888829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2654208, while the sum is 56.

The square root of 166888829 is about 12918.5459321086. The cubic root of 166888829 is about 550.5656208700.

The spelling of 166888829 in words is "one hundred sixty-six million, eight hundred eighty-eight thousand, eight hundred twenty-nine".