2420031665 has 4 divisors (see below), whose sum is σ = 2904038004. Its totient is φ = 1936025328.

The previous prime is 2420031661. The next prime is 2420031667. The reversal of 2420031665 is 5661300242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1351591696 + 1068439969 = 36764^2 + 32687^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420031665 - 2² = 2420031661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2420031661) by changing a digit.

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, 242003162 + ... + 242003171.

It is an arithmetic number, because the mean of its divisors is an integer number (726009501).

Almost surely, 2^2420031665 is an apocalyptic number.

It is an amenable number.

2420031665 is a deficient number, since it is larger than the sum of its proper divisors (484006339).

2420031665 is an equidigital number, since it uses as much as digits as its factorization.

2420031665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484006338.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2420031665 is about 49193.8173452722. The cubic root of 2420031665 is about 1342.5805446256.

The spelling of 2420031665 in words is "two billion, four hundred twenty million, thirty-one thousand, six hundred sixty-five".