166804877 has 2 divisors, whose sum is σ = 166804878. Its totient is φ = 166804876.

The previous prime is 166804871. The next prime is 166804879. The reversal of 166804877 is 778408661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156475081 + 10329796 = 12509^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 166804877 - 2¹⁶ = 166739341 is a prime.

Together with 166804879, 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 (166804871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83402438 + 83402439.

It is an arithmetic number, because the mean of its divisors is an integer number (83402439).

Almost surely, 2^166804877 is an apocalyptic number.

It is an amenable number.

166804877 is a deficient number, since it is larger than the sum of its proper divisors (1).

166804877 is an equidigital number, since it uses as much as digits as its factorization.

166804877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 166804877 is about 12915.2962412792. The cubic root of 166804877 is about 550.4732862745.

The spelling of 166804877 in words is "one hundred sixty-six million, eight hundred four thousand, eight hundred seventy-seven".