3368156721 has 8 divisors (see below), whose sum is σ = 4491145920. Its totient is φ = 2245302672.

The previous prime is 3368156719. The next prime is 3368156741. The reversal of 3368156721 is 1276518633.

3368156721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3368156721 - 2¹ = 3368156719 is a prime.

It is a super-2 number, since 2×3368156721² = 22688959394434943682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3368156741) 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, 69300 + ... + 107418.

It is an arithmetic number, because the mean of its divisors is an integer number (561393240).

Almost surely, 2^3368156721 is an apocalyptic number.

It is an amenable number.

3368156721 is a deficient number, since it is larger than the sum of its proper divisors (1122989199).

3368156721 is a wasteful number, since it uses less digits than its factorization.

3368156721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67575.

The product of its digits is 181440, while the sum is 42.

The square root of 3368156721 is about 58035.8227390635. The cubic root of 3368156721 is about 1498.9854948965.

The spelling of 3368156721 in words is "three billion, three hundred sixty-eight million, one hundred fifty-six thousand, seven hundred twenty-one".