2665412889989 has 2 divisors, whose sum is σ = 2665412889990. Its totient is φ = 2665412889988.

The previous prime is 2665412889941. The next prime is 2665412890001. The reversal of 2665412889989 is 9899882145662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2466124752100 + 199288137889 = 1570390^2 + 446417^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665412889989 - 2¹⁶ = 2665412824453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2665412889929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332706444994 + 1332706444995.

It is an arithmetic number, because the mean of its divisors is an integer number (1332706444995).

Almost surely, 2^{2665412889989} is an apocalyptic number.

It is an amenable number.

2665412889989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665412889989 is an equidigital number, since it uses as much as digits as its factorization.

2665412889989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1074954240, while the sum is 77.

The spelling of 2665412889989 in words is "two trillion, six hundred sixty-five billion, four hundred twelve million, eight hundred eighty-nine thousand, nine hundred eighty-nine".