6645976 has 16 divisors (see below), whose sum is σ = 12612600. Its totient is φ = 3282624.

The previous prime is 6645971. The next prime is 6645979. The reversal of 6645976 is 6795466.

6645976 is a modest number, since divided by 5976 gives 664 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645971) 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 3 ways as a sum of consecutive naturals, for example, 4341 + ... + 5668.

Almost surely, 2^6645976 is an apocalyptic number.

It is an amenable number.

6645976 is a deficient number, since it is larger than the sum of its proper divisors (5966624).

6645976 is a wasteful number, since it uses less digits than its factorization.

6645976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10098 (or 10094 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 6645976 is about 2577.9790534448. The cubic root of 6645976 is about 188.0122973697.

It can be divided in two parts, 664 and 5976, that multiplied together give a square (3968064 = 1992²).

The spelling of 6645976 in words is "six million, six hundred forty-five thousand, nine hundred seventy-six".