2660221552255 has 16 divisors (see below), whose sum is σ = 3368040369120. Its totient is φ = 2011511605248.

The previous prime is 2660221552187. The next prime is 2660221552259. The reversal of 2660221552255 is 5522551220662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2660221552255 - 2⁷ = 2660221552127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660221552259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32294122 + ... + 32376391.

It is an arithmetic number, because the mean of its divisors is an integer number (210502523070).

Almost surely, 2^{2660221552255} is an apocalyptic number.

2660221552255 is a deficient number, since it is larger than the sum of its proper divisors (707818816865).

2660221552255 is a wasteful number, since it uses less digits than its factorization.

2660221552255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64670970.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 2660221552255 in words is "two trillion, six hundred sixty billion, two hundred twenty-one million, five hundred fifty-two thousand, two hundred fifty-five".