3665215121 has 8 divisors (see below), whose sum is σ = 3874684320. Its totient is φ = 3457402272.

The previous prime is 3665215093. The next prime is 3665215133. The reversal of 3665215121 is 1215125663.

3665215121 is digitally balanced in base 3, 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3665215121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3665215921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409535 + ... + 418388.

It is an arithmetic number, because the mean of its divisors is an integer number (484335540).

Almost surely, 2^3665215121 is an apocalyptic number.

It is an amenable number.

3665215121 is a deficient number, since it is larger than the sum of its proper divisors (209469199).

3665215121 is a wasteful number, since it uses less digits than its factorization.

3665215121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828175.

The product of its digits is 10800, while the sum is 32.

The square root of 3665215121 is about 60541.0201516294. The cubic root of 3665215121 is about 1541.8181597001.

The spelling of 3665215121 in words is "three billion, six hundred sixty-five million, two hundred fifteen thousand, one hundred twenty-one".