2203002661 has 4 divisors (see below), whose sum is σ = 2278968300. Its totient is φ = 2127037024.

The previous prime is 2203002649. The next prime is 2203002677. The reversal of 2203002661 is 1662003022.

It is a happy number.

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 1252452100 + 950550561 = 35390^2 + 30831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2203002661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203002691) 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, 37982776 + ... + 37982833.

It is an arithmetic number, because the mean of its divisors is an integer number (569742075).

Almost surely, 2^2203002661 is an apocalyptic number.

It is an amenable number.

2203002661 is a deficient number, since it is larger than the sum of its proper divisors (75965639).

2203002661 is an equidigital number, since it uses as much as digits as its factorization.

2203002661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75965638.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2203002661 is about 46936.1551578312. The cubic root of 2203002661 is about 1301.1828801664.

Adding to 2203002661 its reverse (1662003022), we get a palindrome (3865005683).

The spelling of 2203002661 in words is "two billion, two hundred three million, two thousand, six hundred sixty-one".