6566407 has 2 divisors, whose sum is σ = 6566408. Its totient is φ = 6566406.

The previous prime is 6566393. The next prime is 6566453. The reversal of 6566407 is 7046656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6566407 - 2¹¹ = 6564359 is a prime.

It is the 2563-rd Hogben number.

6566407 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6566507) by changing a digit.

It is a nontrivial repunit in base 2562.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283203 + 3283204.

It is an arithmetic number, because the mean of its divisors is an integer number (3283204).

Almost surely, 2^6566407 is an apocalyptic number.

6566407 is a deficient number, since it is larger than the sum of its proper divisors (1).

6566407 is an equidigital number, since it uses as much as digits as its factorization.

6566407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 6566407 is about 2562.5001463415. The cubic root of 6566407 is about 187.2589566263.

Subtracting 6566407 from its reverse (7046656), we obtain a square (480249 = 693²).

The spelling of 6566407 in words is "six million, five hundred sixty-six thousand, four hundred seven".