2660107536649 has 4 divisors (see below), whose sum is σ = 2660117389636. Its totient is φ = 2660097683664.

The previous prime is 2660107536613. The next prime is 2660107536659. The reversal of 2660107536649 is 9466357010662.

It is a happy number.

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 1868128572025 + 791978964624 = 1366795^2 + 889932^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660107536649 - 2¹³ = 2660107528457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2660107536649.

It is not an unprimeable number, because it can be changed into a prime (2660107536659) 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, 4509774 + ... + 5065399.

It is an arithmetic number, because the mean of its divisors is an integer number (665029347409).

Almost surely, 2^{2660107536649} is an apocalyptic number.

It is an amenable number.

2660107536649 is a deficient number, since it is larger than the sum of its proper divisors (9852987).

2660107536649 is an equidigital number, since it uses as much as digits as its factorization.

2660107536649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9852986.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 2660107536649 in words is "two trillion, six hundred sixty billion, one hundred seven million, five hundred thirty-six thousand, six hundred forty-nine".