166674065 has 8 divisors (see below), whose sum is σ = 200649768. Its totient is φ = 132912000.

The previous prime is 166674047. The next prime is 166674071. The reversal of 166674065 is 560476661.

166674065 = T₃₉₄ + T₃₉₅ + ... + T₁₀₁₉.

It can be written as a sum of positive squares in 4 ways, for example, as 16072081 + 150601984 = 4009^2 + 12272^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166674065 - 2⁸ = 166673809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51686 + ... + 54815.

It is an arithmetic number, because the mean of its divisors is an integer number (25081221).

Almost surely, 2^166674065 is an apocalyptic number.

It is an amenable number.

166674065 is a deficient number, since it is larger than the sum of its proper divisors (33975703).

166674065 is a wasteful number, since it uses less digits than its factorization.

166674065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106819.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 166674065 is about 12910.2310203962. The cubic root of 166674065 is about 550.3293509481.

The spelling of 166674065 in words is "one hundred sixty-six million, six hundred seventy-four thousand, sixty-five".