1009666 has 16 divisors (see below), whose sum is σ = 1774080. Its totient is φ = 421920.

The previous prime is 1009651. The next prime is 1009669. The reversal of 1009666 is 6669001.

It is a happy number.

It is a super-3 number, since 3×1009666³ = 3087837593332260888, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1009669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^1009666 is an apocalyptic number.

1009666 is a deficient number, since it is larger than the sum of its proper divisors (764414).

1009666 is a wasteful number, since it uses less digits than its factorization.

1009666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1009666 is about 1004.8213771611. The cubic root of 1009666 is about 100.3211674107.

The spelling of 1009666 in words is "one million, nine thousand, six hundred sixty-six".