905666 has 8 divisors (see below), whose sum is σ = 1390224. Its totient is φ = 442260.

The previous prime is 905659. The next prime is 905677. The reversal of 905666 is 666509.

905666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 5180 + ... + 5351.

It is an arithmetic number, because the mean of its divisors is an integer number (173778).

2⁹⁰⁵⁶⁶⁶ is an apocalyptic number.

905666 is a deficient number, since it is larger than the sum of its proper divisors (484558).

905666 is a wasteful number, since it uses less digits than its factorization.

905666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10576.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 905666 is about 951.6648569743. The cubic root of 905666 is about 96.7511244965.

The spelling of 905666 in words is "nine hundred five thousand, six hundred sixty-six".