6648690 has 16 divisors (see below), whose sum is σ = 15956928. Its totient is φ = 1772976.

The previous prime is 6648661. The next prime is 6648701. The reversal of 6648690 is 968466.

It is a super-2 number, since 2×6648690² = 88410157432200, which contains 22 as substring.

It is an unprimeable number.

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, 110782 + ... + 110841.

It is an arithmetic number, because the mean of its divisors is an integer number (997308).

Almost surely, 2^6648690 is an apocalyptic number.

6648690 is an abundant number, since it is smaller than the sum of its proper divisors (9308238).

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

6648690 is a wasteful number, since it uses less digits than its factorization.

6648690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221633.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 6648690 is about 2578.5053810299. The cubic root of 6648690 is about 188.0378865850.

The spelling of 6648690 in words is "six million, six hundred forty-eight thousand, six hundred ninety".