3320721641 has 8 divisors (see below), whose sum is σ = 3333046560. Its totient is φ = 3308413248.

The previous prime is 3320721619. The next prime is 3320721659. The reversal of 3320721641 is 1461270233.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3320721641 - 2¹⁴ = 3320705257 is a prime.

It is a super-2 number, since 2×3320721641² = 22054384434011465762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3320721611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513470 + ... + 519896.

It is an arithmetic number, because the mean of its divisors is an integer number (416630820).

Almost surely, 2^3320721641 is an apocalyptic number.

It is an amenable number.

3320721641 is a deficient number, since it is larger than the sum of its proper divisors (12324919).

3320721641 is a wasteful number, since it uses less digits than its factorization.

3320721641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8263.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 3320721641 is about 57625.7029544977. The cubic root of 3320721641 is about 1491.9152646199.

Adding to 3320721641 its reverse (1461270233), we get a palindrome (4781991874).

The spelling of 3320721641 in words is "three billion, three hundred twenty million, seven hundred twenty-one thousand, six hundred forty-one".