166822857 has 6 divisors (see below), whose sum is σ = 240966362. Its totient is φ = 111215232.

The previous prime is 166822847. The next prime is 166822937. The reversal of 166822857 is 758228661.

166822857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 89189136 + 77633721 = 9444^2 + 8811^2 .

It is not a de Polignac number, because 166822857 - 2²⁷ = 32605129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166822847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9267928 + ... + 9267945.

Almost surely, 2^166822857 is an apocalyptic number.

It is an amenable number.

166822857 is a deficient number, since it is larger than the sum of its proper divisors (74143505).

166822857 is a wasteful number, since it uses less digits than its factorization.

166822857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18535879 (or 18535876 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 166822857 is about 12915.9922963743. The cubic root of 166822857 is about 550.4930641817.

The spelling of 166822857 in words is "one hundred sixty-six million, eight hundred twenty-two thousand, eight hundred fifty-seven".