3666353621 has 8 divisors (see below), whose sum is σ = 4215825984. Its totient is φ = 3123308160.

The previous prime is 3666353611. The next prime is 3666353627. The reversal of 3666353621 is 1263536663.

3666353621 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 3666353621 - 2³⁰ = 2592611797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666353627) 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, 1605500 + ... + 1607781.

It is an arithmetic number, because the mean of its divisors is an integer number (526978248).

Almost surely, 2^3666353621 is an apocalyptic number.

It is an amenable number.

3666353621 is a deficient number, since it is larger than the sum of its proper divisors (549472363).

3666353621 is a wasteful number, since it uses less digits than its factorization.

3666353621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213451.

The product of its digits is 349920, while the sum is 41.

The square root of 3666353621 is about 60550.4221372568. The cubic root of 3666353621 is about 1541.9777845512.

The spelling of 3666353621 in words is "three billion, six hundred sixty-six million, three hundred fifty-three thousand, six hundred twenty-one".