6655649 has 32 divisors (see below), whose sum is σ = 9166080. Its totient is φ = 4665600.

The previous prime is 6655639. The next prime is 6655651. The reversal of 6655649 is 9465566.

It is a cyclic number.

It is not a de Polignac number, because 6655649 - 2⁴ = 6655633 is a prime.

It is a super-2 number, since 2×6655649² = 88595327222402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6655639) 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 31 ways as a sum of consecutive naturals, for example, 61007 + ... + 61115.

It is an arithmetic number, because the mean of its divisors is an integer number (286440).

Almost surely, 2^6655649 is an apocalyptic number.

It is an amenable number.

6655649 is a deficient number, since it is larger than the sum of its proper divisors (2510431).

6655649 is a wasteful number, since it uses less digits than its factorization.

6655649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201.

The product of its digits is 194400, while the sum is 41.

The square root of 6655649 is about 2579.8544532589. The cubic root of 6655649 is about 188.1034683951.

The spelling of 6655649 in words is "six million, six hundred fifty-five thousand, six hundred forty-nine".