6759999991 has 2 divisors, whose sum is σ = 6759999992. Its totient is φ = 6759999990.

The previous prime is 6759999979. The next prime is 6760000001. The reversal of 6759999991 is 1999999576.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6759999991 - 2⁵ = 6759999959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6759994991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3379999995 + 3379999996.

It is an arithmetic number, because the mean of its divisors is an integer number (3379999996).

Almost surely, 2^6759999991 is an apocalyptic number.

6759999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6759999991 is an equidigital number, since it uses as much as digits as its factorization.

6759999991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111602610, while the sum is 73.

The square root of 6759999991 is about 82219.2191096461. The cubic root of 6759999991 is about 1890.8143883574.

It can be divided in two parts, 675999999 and 1, that added together give a square (676000000 = 26000²).

The spelling of 6759999991 in words is "six billion, seven hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".