166474277 has 2 divisors, whose sum is σ = 166474278. Its totient is φ = 166474276.

The previous prime is 166474271. The next prime is 166474279. The reversal of 166474277 is 772474661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126922756 + 39551521 = 11266^2 + 6289^2 .

It is a cyclic number.

It is not a de Polignac number, because 166474277 - 2¹² = 166470181 is a prime.

Together with 166474279, 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 (166474271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83237138 + 83237139.

It is an arithmetic number, because the mean of its divisors is an integer number (83237139).

Almost surely, 2^166474277 is an apocalyptic number.

It is an amenable number.

166474277 is a deficient number, since it is larger than the sum of its proper divisors (1).

166474277 is an equidigital number, since it uses as much as digits as its factorization.

166474277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 44.

The square root of 166474277 is about 12902.4911160597. The cubic root of 166474277 is about 550.1093743913.

The spelling of 166474277 in words is "one hundred sixty-six million, four hundred seventy-four thousand, two hundred seventy-seven".