2661552203017 has 4 divisors (see below), whose sum is σ = 2753329865220. Its totient is φ = 2569774540816.

The previous prime is 2661552202999. The next prime is 2661552203027. The reversal of 2661552203017 is 7103022551662.

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 431102549056 + 2230449653961 = 656584^2 + 1493469^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661552203017 - 2¹¹ = 2661552200969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661552203027) 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, 45888831058 + ... + 45888831115.

It is an arithmetic number, because the mean of its divisors is an integer number (688332466305).

Almost surely, 2^{2661552203017} is an apocalyptic number.

It is an amenable number.

2661552203017 is a deficient number, since it is larger than the sum of its proper divisors (91777662203).

2661552203017 is an equidigital number, since it uses as much as digits as its factorization.

2661552203017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91777662202.

The product of its (nonzero) digits is 151200, while the sum is 40.

Adding to 2661552203017 its reverse (7103022551662), we get a palindrome (9764574754679).

The spelling of 2661552203017 in words is "two trillion, six hundred sixty-one billion, five hundred fifty-two million, two hundred three thousand, seventeen".