1013666 has 8 divisors (see below), whose sum is σ = 1573020. Its totient is φ = 489328.

The previous prime is 1013641. The next prime is 1013671. The reversal of 1013666 is 6663101.

It can be written as a sum of positive squares in 2 ways, for example, as 958441 + 55225 = 979^2 + 235^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 8681 + ... + 8796.

2^1013666 is an apocalyptic number.

1013666 is a deficient number, since it is larger than the sum of its proper divisors (559354).

1013666 is a wasteful number, since it uses less digits than its factorization.

1013666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17508.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1013666 is about 1006.8098132219. The cubic root of 1013666 is about 100.4534738397.

Adding to 1013666 its reverse (6663101), we get a palindrome (7676767).

The spelling of 1013666 in words is "one million, thirteen thousand, six hundred sixty-six".