6721772 has 12 divisors (see below), whose sum is σ = 11808720. Its totient is φ = 3347856.

The previous prime is 6721769. The next prime is 6721787. The reversal of 6721772 is 2771276.

It is a happy number.

It is an unprimeable number.

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, 2048 + ... + 4199.

It is an arithmetic number, because the mean of its divisors is an integer number (984060).

Almost surely, 2^6721772 is an apocalyptic number.

It is an amenable number.

6721772 is a deficient number, since it is larger than the sum of its proper divisors (5086948).

6721772 is a wasteful number, since it uses less digits than its factorization.

6721772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6520 (or 6518 counting only the distinct ones).

The product of its digits is 8232, while the sum is 32.

The square root of 6721772 is about 2592.6380387551. The cubic root of 6721772 is about 188.7243445679.

The spelling of 6721772 in words is "six million, seven hundred twenty-one thousand, seven hundred seventy-two".