6687124357 has 2 divisors, whose sum is σ = 6687124358. Its totient is φ = 6687124356.

The previous prime is 6687124349. The next prime is 6687124361. The reversal of 6687124357 is 7534217866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3447920961 + 3239203396 = 58719^2 + 56914^2 .

It is a cyclic number.

It is not a de Polignac number, because 6687124357 - 2³ = 6687124349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6687124357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6687124657) 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 as a sum of consecutive naturals, namely, 3343562178 + 3343562179.

It is an arithmetic number, because the mean of its divisors is an integer number (3343562179).

Almost surely, 2^6687124357 is an apocalyptic number.

It is an amenable number.

6687124357 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687124357 is an equidigital number, since it uses as much as digits as its factorization.

6687124357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 49.

The square root of 6687124357 is about 81774.8393884085. The cubic root of 6687124357 is about 1883.9952342811.

It can be divided in two parts, 6687 and 124357, that added together give a square (131044 = 362²).

The spelling of 6687124357 in words is "six billion, six hundred eighty-seven million, one hundred twenty-four thousand, three hundred fifty-seven".