6669451 has 2 divisors, whose sum is σ = 6669452. Its totient is φ = 6669450.

The previous prime is 6669413. The next prime is 6669463. The reversal of 6669451 is 1549666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6669451 - 2⁹ = 6668939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6669451.

It is not a weakly prime, because it can be changed into another prime (6669401) 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, 3334725 + 3334726.

It is an arithmetic number, because the mean of its divisors is an integer number (3334726).

Almost surely, 2^6669451 is an apocalyptic number.

6669451 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669451 is an equidigital number, since it uses as much as digits as its factorization.

6669451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 6669451 is about 2582.5280250173. The cubic root of 6669451 is about 188.2334037092.

The spelling of 6669451 in words is "six million, six hundred sixty-nine thousand, four hundred fifty-one".