2240621665 has 8 divisors (see below), whose sum is σ = 2692228968. Its totient is φ = 1790175360.

The previous prime is 2240621657. The next prime is 2240621671. The reversal of 2240621665 is 5661260422.

It can be written as a sum of positive squares in 4 ways, for example, as 80138304 + 2160483361 = 8952^2 + 46481^2 .

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

It is not a de Polignac number, because 2240621665 - 2³ = 2240621657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2240621665.

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, 285996 + ... + 293725.

It is an arithmetic number, because the mean of its divisors is an integer number (336528621).

Almost surely, 2^2240621665 is an apocalyptic number.

It is an amenable number.

2240621665 is a deficient number, since it is larger than the sum of its proper divisors (451607303).

2240621665 is an equidigital number, since it uses as much as digits as its factorization.

2240621665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580499.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 2240621665 is about 47335.2053444368. The cubic root of 2240621665 is about 1308.5475549890.

The spelling of 2240621665 in words is "two billion, two hundred forty million, six hundred twenty-one thousand, six hundred sixty-five".