166867445 has 4 divisors (see below), whose sum is σ = 200240940. Its totient is φ = 133493952.

The previous prime is 166867397. The next prime is 166867457. The reversal of 166867445 is 544768661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544768661 = 139 ⋅3919199.

It can be written as a sum of positive squares in 2 ways, for example, as 19439281 + 147428164 = 4409^2 + 12142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166867445 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166867445.

It is a congruent 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, 16686740 + ... + 16686749.

It is an arithmetic number, because the mean of its divisors is an integer number (50060235).

Almost surely, 2^166867445 is an apocalyptic number.

It is an amenable number.

166867445 is a deficient number, since it is larger than the sum of its proper divisors (33373495).

166867445 is an equidigital number, since it uses as much as digits as its factorization.

166867445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33373494.

The product of its digits is 967680, while the sum is 47.

The square root of 166867445 is about 12917.7182582684. The cubic root of 166867445 is about 550.5421046203.

The spelling of 166867445 in words is "one hundred sixty-six million, eight hundred sixty-seven thousand, four hundred forty-five".