900666 has 32 divisors (see below), whose sum is σ = 2157120. Its totient is φ = 276912.

The previous prime is 900659. The next prime is 900671. The reversal of 900666 is 666009.

It is a super-2 number, since 2×900666² = 1622398487112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 61 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (67410).

2⁹⁰⁰⁶⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 900666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1078560).

900666 is an abundant number, since it is smaller than the sum of its proper divisors (1256454).

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

900666 is a wasteful number, since it uses less digits than its factorization.

900666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 900666 is about 949.0342459574. The cubic root of 900666 is about 96.5727479933.

The spelling of 900666 in words is "nine hundred thousand, six hundred sixty-six".