6646455 has 20 divisors (see below), whose sum is σ = 11915112. Its totient is φ = 3544560.

The previous prime is 6646429. The next prime is 6646477. The reversal of 6646455 is 5546466.

It is a happy number.

6646455 is a `hidden beast` number, since 6 + 6 + 4 + 645 + 5 = 666.

It is not a de Polignac number, because 6646455 - 2⁹ = 6645943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7801 + ... + 8610.

Almost surely, 2^6646455 is an apocalyptic number.

6646455 is a deficient number, since it is larger than the sum of its proper divisors (5268657).

6646455 is a wasteful number, since it uses less digits than its factorization.

6646455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16428 (or 16419 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 6646455 is about 2578.0719539997. The cubic root of 6646455 is about 188.0168141744.

The spelling of 6646455 in words is "six million, six hundred forty-six thousand, four hundred fifty-five".