2665002251 has 4 divisors (see below), whose sum is σ = 2704778472. Its totient is φ = 2625226032.

The previous prime is 2665002239. The next prime is 2665002257. The reversal of 2665002251 is 1522005662.

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

It is a cyclic number.

It is not a de Polignac number, because 2665002251 - 2¹⁸ = 2664740107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665002257) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19888010 + ... + 19888143.

It is an arithmetic number, because the mean of its divisors is an integer number (676194618).

Almost surely, 2^2665002251 is an apocalyptic number.

2665002251 is a deficient number, since it is larger than the sum of its proper divisors (39776221).

2665002251 is an equidigital number, since it uses as much as digits as its factorization.

2665002251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39776220.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2665002251 is about 51623.6597985846. The cubic root of 2665002251 is about 1386.4339783134.

The spelling of 2665002251 in words is "two billion, six hundred sixty-five million, two thousand, two hundred fifty-one".