6687379 has 2 divisors, whose sum is σ = 6687380. Its totient is φ = 6687378.

The previous prime is 6687367. The next prime is 6687383. The reversal of 6687379 is 9737866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6687379 - 2⁷ = 6687251 is a prime.

It is not a weakly prime, because it can be changed into another prime (6687389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343689 + 3343690.

It is an arithmetic number, because the mean of its divisors is an integer number (3343690).

Almost surely, 2^6687379 is an apocalyptic number.

6687379 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687379 is an equidigital number, since it uses as much as digits as its factorization.

6687379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 6687379 is about 2585.9967130683. The cubic root of 6687379 is about 188.4019147904.

It can be divided in two parts, 668737 and 9, that added together give a triangular number (668746 = T₁₁₅₆).

The spelling of 6687379 in words is "six million, six hundred eighty-seven thousand, three hundred seventy-nine".