2660289194881 has 2 divisors, whose sum is σ = 2660289194882. Its totient is φ = 2660289194880.

The previous prime is 2660289194867. The next prime is 2660289194921. The reversal of 2660289194881 is 1884919820662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2104196842225 + 556092352656 = 1450585^2 + 745716^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660289194881 - 2⁹ = 2660289194369 is a prime.

It is a super-2 number, since 2×2660289194881² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2660289194821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330144597440 + 1330144597441.

It is an arithmetic number, because the mean of its divisors is an integer number (1330144597441).

Almost surely, 2^{2660289194881} is an apocalyptic number.

It is an amenable number.

2660289194881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660289194881 is an equidigital number, since it uses as much as digits as its factorization.

2660289194881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23887872, while the sum is 64.

The spelling of 2660289194881 in words is "two trillion, six hundred sixty billion, two hundred eighty-nine million, one hundred ninety-four thousand, eight hundred eighty-one".