6663590 has 16 divisors (see below), whose sum is σ = 12026880. Its totient is φ = 2658240.

The previous prime is 6663557. The next prime is 6663593. The reversal of 6663590 is 953666.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6663590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663593) 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 in 7 ways as a sum of consecutive naturals, for example, 4571 + ... + 5849.

It is an arithmetic number, because the mean of its divisors is an integer number (751680).

Almost surely, 2^6663590 is an apocalyptic number.

6663590 is a deficient number, since it is larger than the sum of its proper divisors (5363290).

6663590 is a wasteful number, since it uses less digits than its factorization.

6663590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 6663590 is about 2581.3930347779. The cubic root of 6663590 is about 188.1782487794.

The spelling of 6663590 in words is "six million, six hundred sixty-three thousand, five hundred ninety".