166252277 has 4 divisors (see below), whose sum is σ = 167966316. Its totient is φ = 164538240.

The previous prime is 166252249. The next prime is 166252279. The reversal of 166252277 is 772252661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 772252661 = 5227 ⋅147743.

It can be written as a sum of positive squares in 2 ways, for example, as 23951236 + 142301041 = 4894^2 + 11929^2 .

It is a cyclic number.

It is not a de Polignac number, because 166252277 - 2¹⁸ = 165990133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166252277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166252279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856874 + ... + 857067.

It is an arithmetic number, because the mean of its divisors is an integer number (41991579).

Almost surely, 2^166252277 is an apocalyptic number.

It is an amenable number.

166252277 is a deficient number, since it is larger than the sum of its proper divisors (1714039).

166252277 is an equidigital number, since it uses as much as digits as its factorization.

166252277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714038.

The product of its digits is 70560, while the sum is 38.

The square root of 166252277 is about 12893.8852561980. The cubic root of 166252277 is about 549.8647347801.

The spelling of 166252277 in words is "one hundred sixty-six million, two hundred fifty-two thousand, two hundred seventy-seven".