166008445 has 4 divisors (see below), whose sum is σ = 199210140. Its totient is φ = 132806752.

The previous prime is 166008439. The next prime is 166008461. The reversal of 166008445 is 544800661.

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 28579716 + 137428729 = 5346^2 + 11723^2 .

It is a cyclic number.

It is not a de Polignac number, because 166008445 - 2²³ = 157619837 is a prime.

It is a super-2 number, since 2×166008445² = 55117607622636050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166008445.

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, 16600840 + ... + 16600849.

It is an arithmetic number, because the mean of its divisors is an integer number (49802535).

Almost surely, 2^166008445 is an apocalyptic number.

It is an amenable number.

166008445 is a deficient number, since it is larger than the sum of its proper divisors (33201695).

166008445 is an equidigital number, since it uses as much as digits as its factorization.

166008445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33201694.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 166008445 is about 12884.4264521165. The cubic root of 166008445 is about 549.5957856461.

The spelling of 166008445 in words is "one hundred sixty-six million, eight thousand, four hundred forty-five".