2661351226203 has 8 divisors (see below), whose sum is σ = 3644372850448. Its totient is φ = 1726281876384.

The previous prime is 2661351226199. The next prime is 2661351226243. The reversal of 2661351226203 is 3026221531662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2661351226203 - 2² = 2661351226199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661351226243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11988068476 + ... + 11988068697.

It is an arithmetic number, because the mean of its divisors is an integer number (455546606306).

Almost surely, 2^{2661351226203} is an apocalyptic number.

2661351226203 is a deficient number, since it is larger than the sum of its proper divisors (983021624245).

2661351226203 is a wasteful number, since it uses less digits than its factorization.

2661351226203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23976137213.

The product of its (nonzero) digits is 155520, while the sum is 39.

Adding to 2661351226203 its reverse (3026221531662), we get a palindrome (5687572757865).

The spelling of 2661351226203 in words is "two trillion, six hundred sixty-one billion, three hundred fifty-one million, two hundred twenty-six thousand, two hundred three".