2660971739 has 2 divisors, whose sum is σ = 2660971740. Its totient is φ = 2660971738.

The previous prime is 2660971723. The next prime is 2660971771. The reversal of 2660971739 is 9371790662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2660971739 - 2⁴ = 2660971723 is a prime.

It is not a weakly prime, because it can be changed into another prime (2660971639) 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 as a sum of consecutive naturals, namely, 1330485869 + 1330485870.

It is an arithmetic number, because the mean of its divisors is an integer number (1330485870).

Almost surely, 2^2660971739 is an apocalyptic number.

2660971739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660971739 is an equidigital number, since it uses as much as digits as its factorization.

2660971739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 2660971739 is about 51584.6075782302. The cubic root of 2660971739 is about 1385.7346845643.

The spelling of 2660971739 in words is "two billion, six hundred sixty million, nine hundred seventy-one thousand, seven hundred thirty-nine".