6648655 has 16 divisors (see below), whose sum is σ = 8648640. Its totient is φ = 4877568.

The previous prime is 6648647. The next prime is 6648661. The reversal of 6648655 is 5568466.

It is a cyclic number.

It is not a de Polignac number, because 6648655 - 2³ = 6648647 is a prime.

It is a super-2 number, since 2×6648655² = 88409226618050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14926 + ... + 15364.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^6648655 is an apocalyptic number.

6648655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6648655 is a deficient number, since it is larger than the sum of its proper divisors (1999985).

6648655 is a wasteful number, since it uses less digits than its factorization.

6648655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690.

The product of its digits is 172800, while the sum is 40.

The square root of 6648655 is about 2578.4985941435. The cubic root of 6648655 is about 188.0375566284.

The spelling of 6648655 in words is "six million, six hundred forty-eight thousand, six hundred fifty-five".