3886667921 has 16 divisors (see below), whose sum is σ = 3991887360. Its totient is φ = 3782775360.

The previous prime is 3886667909. The next prime is 3886667927. The reversal of 3886667921 is 1297666883.

It is not a de Polignac number, because 3886667921 - 2¹⁸ = 3886405777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3886667927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5230676 + ... + 5231418.

It is an arithmetic number, because the mean of its divisors is an integer number (249492960).

Almost surely, 2^3886667921 is an apocalyptic number.

It is an amenable number.

3886667921 is a deficient number, since it is larger than the sum of its proper divisors (105219439).

3886667921 is a wasteful number, since it uses less digits than its factorization.

3886667921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456.

The product of its digits is 5225472, while the sum is 56.

The square root of 3886667921 is about 62343.1465439466. The cubic root of 3886667921 is about 1572.2652360447.

The spelling of 3886667921 in words is "three billion, eight hundred eighty-six million, six hundred sixty-seven thousand, nine hundred twenty-one".