3666668672 has 16 divisors (see below), whose sum is σ = 7304691750. Its totient is φ = 1833334272.

The previous prime is 3666668641. The next prime is 3666668711. The reversal of 3666668672 is 2768666663.

It can be written as a sum of positive squares in only one way, i.e., 3160238656 + 506430016 = 56216^2 + 22504^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322797 + ... + 14323052.

Almost surely, 2^3666668672 is an apocalyptic number.

3666668672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3666668672 is a deficient number, since it is larger than the sum of its proper divisors (3638023078).

3666668672 is an equidigital number, since it uses as much as digits as its factorization.

3666668672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28645863 (or 28645851 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 56.

The square root of 3666668672 is about 60553.0236404426. The cubic root of 3666668672 is about 1542.0219508428.

The spelling of 3666668672 in words is "three billion, six hundred sixty-six million, six hundred sixty-eight thousand, six hundred seventy-two".