6690473 has 2 divisors, whose sum is σ = 6690474. Its totient is φ = 6690472.

The previous prime is 6690433. The next prime is 6690479. The reversal of 6690473 is 3740966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5583769 + 1106704 = 2363^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 6690473 - 2²⁰ = 5641897 is a prime.

It is not a weakly prime, because it can be changed into another prime (6690479) 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 as a sum of consecutive naturals, namely, 3345236 + 3345237.

It is an arithmetic number, because the mean of its divisors is an integer number (3345237).

Almost surely, 2^6690473 is an apocalyptic number.

It is an amenable number.

6690473 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690473 is an equidigital number, since it uses as much as digits as its factorization.

6690473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 6690473 is about 2586.5948658420. The cubic root of 6690473 is about 188.4309658157.

The spelling of 6690473 in words is "six million, six hundred ninety thousand, four hundred seventy-three".