2666445 has 8 divisors (see below), whose sum is σ = 4266336. Its totient is φ = 1422096.

The previous prime is 2666429. The next prime is 2666453. The reversal of 2666445 is 5446662.

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

It is not a de Polignac number, because 2666445 - 2⁴ = 2666429 is a prime.

2666445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88867 + ... + 88896.

It is an arithmetic number, because the mean of its divisors is an integer number (533292).

2^2666445 is an apocalyptic number.

It is an amenable number.

2666445 is a deficient number, since it is larger than the sum of its proper divisors (1599891).

2666445 is a wasteful number, since it uses less digits than its factorization.

2666445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177771.

The product of its digits is 34560, while the sum is 33.

The square root of 2666445 is about 1632.9252891667. The cubic root of 2666445 is about 138.6684123866.

The spelling of 2666445 in words is "two million, six hundred sixty-six thousand, four hundred forty-five".