3664672921 has 8 divisors (see below), whose sum is σ = 4510366784. Its totient is φ = 2899521360.

The previous prime is 3664672919. The next prime is 3664672931. The reversal of 3664672921 is 1292764663.

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 3664672921 - 2¹ = 3664672919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3664672931) 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, 20135475 + ... + 20135656.

It is an arithmetic number, because the mean of its divisors is an integer number (563795848).

Almost surely, 2^3664672921 is an apocalyptic number.

It is an amenable number.

3664672921 is a deficient number, since it is larger than the sum of its proper divisors (845693863).

3664672921 is a wasteful number, since it uses less digits than its factorization.

3664672921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40271151.

The product of its digits is 653184, while the sum is 46.

The square root of 3664672921 is about 60536.5420304133. The cubic root of 3664672921 is about 1541.7421282345.

The spelling of 3664672921 in words is "three billion, six hundred sixty-four million, six hundred seventy-two thousand, nine hundred twenty-one".