3066721 has 8 divisors (see below), whose sum is σ = 3625920. Its totient is φ = 2537808.

The previous prime is 3066709. The next prime is 3066731. The reversal of 3066721 is 1276603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3066721 - 2⁵ = 3066689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3066731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7351 + ... + 7756.

It is an arithmetic number, because the mean of its divisors is an integer number (453240).

Almost surely, 2^3066721 is an apocalyptic number.

It is an amenable number.

3066721 is a deficient number, since it is larger than the sum of its proper divisors (559199).

3066721 is a wasteful number, since it uses less digits than its factorization.

3066721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15143.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 3066721 is about 1751.2055847330. The cubic root of 3066721 is about 145.2863307636.

The spelling of 3066721 in words is "three million, sixty-six thousand, seven hundred twenty-one".