2640430566 has 36 divisors (see below), whose sum is σ = 5857149012. Its totient is φ = 859209624.

The previous prime is 2640430489. The next prime is 2640430571. The reversal of 2640430566 is 6650340462.

2640430566 is a `hidden beast` number, since 2 + 64 + 0 + 4 + 30 + 566 = 666.

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 2640430566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1428655 + ... + 1430501.

Almost surely, 2^2640430566 is an apocalyptic number.

2640430566 is an abundant number, since it is smaller than the sum of its proper divisors (3216718446).

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

2640430566 is an equidigital number, since it uses as much as digits as its factorization.

2640430566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 2640430566 is about 51385.1200835417. The cubic root of 2640430566 is about 1382.1597781120.

The spelling of 2640430566 in words is "two billion, six hundred forty million, four hundred thirty thousand, five hundred sixty-six".