166861883 has 2 divisors, whose sum is σ = 166861884. Its totient is φ = 166861882.

The previous prime is 166861873. The next prime is 166861889. The reversal of 166861883 is 388168661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166861883 - 2¹² = 166857787 is a prime.

It is not a weakly prime, because it can be changed into another prime (166861889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83430941 + 83430942.

It is an arithmetic number, because the mean of its divisors is an integer number (83430942).

Almost surely, 2^166861883 is an apocalyptic number.

166861883 is a deficient number, since it is larger than the sum of its proper divisors (1).

166861883 is an equidigital number, since it uses as much as digits as its factorization.

166861883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 47.

The square root of 166861883 is about 12917.5029707757. The cubic root of 166861883 is about 550.5359876908.

The spelling of 166861883 in words is "one hundred sixty-six million, eight hundred sixty-one thousand, eight hundred eighty-three".