9040491866 has 36 divisors (see below), whose sum is σ = 16211346858. Its totient is φ = 3767392944.

The previous prime is 9040491851. The next prime is 9040491881. The reversal of 9040491866 is 6681940409.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9040491851) and next prime (9040491881).

It can be written as a sum of positive squares in only one way, i.e., 5986271641 + 3054220225 = 77371^2 + 55265^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9040491866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5724665 + ... + 5726243.

Almost surely, 2^9040491866 is an apocalyptic number.

9040491866 is a deficient number, since it is larger than the sum of its proper divisors (7170854992).

9040491866 is an equidigital number, since it uses as much as digits as its factorization.

9040491866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 9040491866 is about 95081.5011766222. The cubic root of 9040491866 is about 2083.1986554916.

The spelling of 9040491866 in words is "nine billion, forty million, four hundred ninety-one thousand, eight hundred sixty-six".