2660709679 has 4 divisors (see below), whose sum is σ = 2661543576. Its totient is φ = 2659875784.

The previous prime is 2660709673. The next prime is 2660709703. The reversal of 2660709679 is 9769070662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2660709679 - 2³ = 2660709671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660709671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412144 + ... + 418549.

It is an arithmetic number, because the mean of its divisors is an integer number (665385894).

Almost surely, 2^2660709679 is an apocalyptic number.

2660709679 is a deficient number, since it is larger than the sum of its proper divisors (833897).

2660709679 is an equidigital number, since it uses as much as digits as its factorization.

2660709679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833896.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 2660709679 is about 51582.0674168843. The cubic root of 2660709679 is about 1385.6891927178.

The spelling of 2660709679 in words is "two billion, six hundred sixty million, seven hundred nine thousand, six hundred seventy-nine".