906663 has 4 divisors (see below), whose sum is σ = 1208888. Its totient is φ = 604440.

The previous prime is 906649. The next prime is 906673. The reversal of 906663 is 366609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366609 = 3 ⋅122203.

It is not a de Polignac number, because 906663 - 2¹⁸ = 644519 is a prime.

It is a D-number.

It is a Duffinian number.

906663 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 906663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906613) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 151108 + ... + 151113.

It is an arithmetic number, because the mean of its divisors is an integer number (302222).

2⁹⁰⁶⁶⁶³ is an apocalyptic number.

906663 is a deficient number, since it is larger than the sum of its proper divisors (302225).

906663 is a wasteful number, since it uses less digits than its factorization.

906663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302224.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 906663 is about 952.1885317520. The cubic root of 906663 is about 96.7866142158.

The spelling of 906663 in words is "nine hundred six thousand, six hundred sixty-three".