6669490 has 16 divisors (see below), whose sum is σ = 12035160. Its totient is φ = 2661120.

The previous prime is 6669473. The next prime is 6669493. The reversal of 6669490 is 949666.

It can be written as a sum of positive squares in 4 ways, for example, as 5631129 + 1038361 = 2373^2 + 1019^2 .

It is not an unprimeable number, because it can be changed into a prime (6669493) 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 7 ways as a sum of consecutive naturals, for example, 6106 + ... + 7114.

Almost surely, 2^6669490 is an apocalyptic number.

6669490 is a deficient number, since it is larger than the sum of its proper divisors (5365670).

6669490 is a wasteful number, since it uses less digits than its factorization.

6669490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 6669490 is about 2582.5355757472. The cubic root of 6669490 is about 188.2337706104.

The spelling of 6669490 in words is "six million, six hundred sixty-nine thousand, four hundred ninety".