6691379 has 4 divisors (see below), whose sum is σ = 6776160. Its totient is φ = 6606600.

The previous prime is 6691369. The next prime is 6691397. The reversal of 6691379 is 9731966.

It is a happy number.

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 6691379 - 2¹² = 6687283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6691309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42272 + ... + 42429.

It is an arithmetic number, because the mean of its divisors is an integer number (1694040).

Almost surely, 2^6691379 is an apocalyptic number.

6691379 is a deficient number, since it is larger than the sum of its proper divisors (84781).

6691379 is an equidigital number, since it uses as much as digits as its factorization.

6691379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84780.

The product of its digits is 61236, while the sum is 41.

The square root of 6691379 is about 2586.7699936407. The cubic root of 6691379 is about 188.4394709817.

It can be divided in two parts, 669 and 1379, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 6691379 in words is "six million, six hundred ninety-one thousand, three hundred seventy-nine".