6690479 has 2 divisors, whose sum is σ = 6690480. Its totient is φ = 6690478.

The previous prime is 6690473. The next prime is 6690517. The reversal of 6690479 is 9740966.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6690479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6690473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345239 + 3345240.

It is an arithmetic number, because the mean of its divisors is an integer number (3345240).

Almost surely, 2^6690479 is an apocalyptic number.

6690479 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690479 is an equidigital number, since it uses as much as digits as its factorization.

6690479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 6690479 is about 2586.5960256677. The cubic root of 6690479 is about 188.4310221438.

The spelling of 6690479 in words is "six million, six hundred ninety thousand, four hundred seventy-nine".