2660749849 has 8 divisors (see below), whose sum is σ = 2825389728. Its totient is φ = 2497012800.

The previous prime is 2660749837. The next prime is 2660749859. The reversal of 2660749849 is 9489470662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2660749849 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 2660749849.

It is not an unprimeable number, because it can be changed into a prime (2660749859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219627 + ... + 231424.

It is an arithmetic number, because the mean of its divisors is an integer number (353173716).

Almost surely, 2^2660749849 is an apocalyptic number.

It is an amenable number.

2660749849 is a deficient number, since it is larger than the sum of its proper divisors (164639879).

2660749849 is a wasteful number, since it uses less digits than its factorization.

2660749849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451415.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The square root of 2660749849 is about 51582.4567949221. The cubic root of 2660749849 is about 1385.6961661524.

The spelling of 2660749849 in words is "two billion, six hundred sixty million, seven hundred forty-nine thousand, eight hundred forty-nine".