2566406 has 8 divisors (see below), whose sum is σ = 4052280. Its totient is φ = 1215648.

The previous prime is 2566367. The next prime is 2566411. The reversal of 2566406 is 6046652.

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

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, 33731 + ... + 33806.

It is an arithmetic number, because the mean of its divisors is an integer number (506535).

2^2566406 is an apocalyptic number.

2566406 is a deficient number, since it is larger than the sum of its proper divisors (1485874).

2566406 is a wasteful number, since it uses less digits than its factorization.

2566406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67558.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2566406 is about 1602.0006242196. Note that the first 3 decimals coincide. The cubic root of 2566406 is about 136.9120859593.

The spelling of 2566406 in words is "two million, five hundred sixty-six thousand, four hundred six".