2535866661 has 4 divisors (see below), whose sum is σ = 3381155552. Its totient is φ = 1690577772.

The previous prime is 2535866651. The next prime is 2535866701. The reversal of 2535866661 is 1666685352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2535866661 - 2⁷ = 2535866533 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 2535866661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2535866621) 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, 422644441 + ... + 422644446.

It is an arithmetic number, because the mean of its divisors is an integer number (845288888).

Almost surely, 2^2535866661 is an apocalyptic number.

It is an amenable number.

2535866661 is a deficient number, since it is larger than the sum of its proper divisors (845288891).

2535866661 is an equidigital number, since it uses as much as digits as its factorization.

2535866661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845288890.

The product of its digits is 1555200, while the sum is 48.

The square root of 2535866661 is about 50357.3893386065. The cubic root of 2535866661 is about 1363.6684875653.

The spelling of 2535866661 in words is "two billion, five hundred thirty-five million, eight hundred sixty-six thousand, six hundred sixty-one".