3665229521 has 8 divisors (see below), whose sum is σ = 3717964800. Its totient is φ = 3612525280.

The previous prime is 3665229517. The next prime is 3665229551. The reversal of 3665229521 is 1259225663.

3665229521 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 not a de Polignac number, because 3665229521 - 2² = 3665229517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3665229551) 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, 341840 + ... + 352398.

It is an arithmetic number, because the mean of its divisors is an integer number (464745600).

Almost surely, 2^3665229521 is an apocalyptic number.

It is an amenable number.

3665229521 is a deficient number, since it is larger than the sum of its proper divisors (52735279).

3665229521 is a wasteful number, since it uses less digits than its factorization.

3665229521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15519.

The product of its digits is 194400, while the sum is 41.

The square root of 3665229521 is about 60541.1390791419. The cubic root of 3665229521 is about 1541.8201788769.

The spelling of 3665229521 in words is "three billion, six hundred sixty-five million, two hundred twenty-nine thousand, five hundred twenty-one".