2660986897 has 12 divisors (see below), whose sum is σ = 2911352868. Its totient is φ = 2423654400.

The previous prime is 2660986883. The next prime is 2660986903. The reversal of 2660986897 is 7986890662.

It can be written as a sum of positive squares in 2 ways, for example, as 2059707456 + 601279441 = 45384^2 + 24521^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2660986897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2660986837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65104 + ... + 97777.

It is an arithmetic number, because the mean of its divisors is an integer number (242612739).

Almost surely, 2^2660986897 is an apocalyptic number.

It is an amenable number.

2660986897 is a deficient number, since it is larger than the sum of its proper divisors (250365971).

2660986897 is a wasteful number, since it uses less digits than its factorization.

2660986897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162960 (or 162929 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 61.

The square root of 2660986897 is about 51584.7545016936. The cubic root of 2660986897 is about 1385.7373157993.

The spelling of 2660986897 in words is "two billion, six hundred sixty million, nine hundred eighty-six thousand, eight hundred ninety-seven".