166373065 has 4 divisors (see below), whose sum is σ = 199647684. Its totient is φ = 133098448.

The previous prime is 166373023. The next prime is 166373069. The reversal of 166373065 is 560373661.

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 45549001 + 120824064 = 6749^2 + 10992^2 .

It is a cyclic number.

It is not a de Polignac number, because 166373065 - 2²⁵ = 132818633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166373069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16637302 + ... + 16637311.

It is an arithmetic number, because the mean of its divisors is an integer number (49911921).

Almost surely, 2^166373065 is an apocalyptic number.

It is an amenable number.

166373065 is a deficient number, since it is larger than the sum of its proper divisors (33274619).

166373065 is an equidigital number, since it uses as much as digits as its factorization.

166373065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33274618.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 166373065 is about 12898.5683314079. The cubic root of 166373065 is about 549.9978677603.

The spelling of 166373065 in words is "one hundred sixty-six million, three hundred seventy-three thousand, sixty-five".