166282385 has 4 divisors (see below), whose sum is σ = 199538868. Its totient is φ = 133025904.

The previous prime is 166282379. The next prime is 166282399. The reversal of 166282385 is 583282661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119071744 + 47210641 = 10912^2 + 6871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166282385 is a prime.

It is a super-2 number, since 2×166282385² = 55299663122576450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16628234 + ... + 16628243.

It is an arithmetic number, because the mean of its divisors is an integer number (49884717).

Almost surely, 2^166282385 is an apocalyptic number.

It is an amenable number.

166282385 is a deficient number, since it is larger than the sum of its proper divisors (33256483).

166282385 is an equidigital number, since it uses as much as digits as its factorization.

166282385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33256482.

The product of its digits is 138240, while the sum is 41.

The square root of 166282385 is about 12895.0527335099. The cubic root of 166282385 is about 549.8979259609.

The spelling of 166282385 in words is "one hundred sixty-six million, two hundred eighty-two thousand, three hundred eighty-five".