2501162665 has 4 divisors (see below), whose sum is σ = 3001395204. Its totient is φ = 2000930128.

The previous prime is 2501162663. The next prime is 2501162683. The reversal of 2501162665 is 5662611052.

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 1037870656 + 1463292009 = 32216^2 + 38253^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501162665 - 2¹ = 2501162663 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 2501162665.

It is not an unprimeable number, because it can be changed into a prime (2501162663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250116262 + ... + 250116271.

It is an arithmetic number, because the mean of its divisors is an integer number (750348801).

Almost surely, 2^2501162665 is an apocalyptic number.

It is an amenable number.

2501162665 is a deficient number, since it is larger than the sum of its proper divisors (500232539).

2501162665 is an equidigital number, since it uses as much as digits as its factorization.

2501162665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500232538.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2501162665 is about 50011.6252985243. The cubic root of 2501162665 is about 1357.4191729136.

The spelling of 2501162665 in words is "two billion, five hundred one million, one hundred sixty-two thousand, six hundred sixty-five".