1009668866 has 16 divisors (see below), whose sum is σ = 1536003000. Its totient is φ = 497701248.

The previous prime is 1009668859. The next prime is 1009668871. The reversal of 1009668866 is 6688669001.

It can be written as a sum of positive squares in 4 ways, for example, as 898260841 + 111408025 = 29971^2 + 10555^2 .

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 7 ways as a sum of consecutive naturals, for example, 53996 + ... + 70248.

Almost surely, 2^1009668866 is an apocalyptic number.

1009668866 is a deficient number, since it is larger than the sum of its proper divisors (526334134).

1009668866 is a wasteful number, since it uses less digits than its factorization.

1009668866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16693.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 1009668866 is about 31775.2870325352. The cubic root of 1009668866 is about 1003.2126233322.

The spelling of 1009668866 in words is "one billion, nine million, six hundred sixty-eight thousand, eight hundred sixty-six".