6663490 has 32 divisors (see below), whose sum is σ = 13374720. Its totient is φ = 2375424.

The previous prime is 6663487. The next prime is 6663493. The reversal of 6663490 is 943666.

It is an interprime number because it is at equal distance from previous prime (6663487) and next prime (6663493).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6663493) 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 15 ways as a sum of consecutive naturals, for example, 2199 + ... + 4261.

It is an arithmetic number, because the mean of its divisors is an integer number (417960).

Almost surely, 2^6663490 is an apocalyptic number.

6663490 is an abundant number, since it is smaller than the sum of its proper divisors (6711230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6663490 is a wasteful number, since it uses less digits than its factorization.

6663490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 6663490 is about 2581.3736653185. The cubic root of 6663490 is about 188.1773074490.

The spelling of 6663490 in words is "six million, six hundred sixty-three thousand, four hundred ninety".