1906566 has 16 divisors (see below), whose sum is σ = 3834864. Its totient is φ = 631904.

The previous prime is 1906559. The next prime is 1906579. The reversal of 1906566 is 6656091.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (239679).

2^1906566 is an apocalyptic number.

1906566 is an abundant number, since it is smaller than the sum of its proper divisors (1928298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1906566 is a wasteful number, since it uses less digits than its factorization.

1906566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 1906566 is about 1380.7845595892. The cubic root of 1906566 is about 123.9987426165.

The spelling of 1906566 in words is "one million, nine hundred six thousand, five hundred sixty-six".