3664221378 has 32 divisors (see below), whose sum is σ = 7794372096. Its totient is φ = 1144397568.

The previous prime is 3664221343. The next prime is 3664221391. The reversal of 3664221378 is 8731224663.

3664221378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57801 + ... + 103292.

It is an arithmetic number, because the mean of its divisors is an integer number (243574128).

Almost surely, 2^3664221378 is an apocalyptic number.

3664221378 is an abundant number, since it is smaller than the sum of its proper divisors (4130150718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3664221378 is a wasteful number, since it uses less digits than its factorization.

3664221378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161338.

The product of its digits is 290304, while the sum is 42.

The square root of 3664221378 is about 60532.8124078173. The cubic root of 3664221378 is about 1541.6788036691.

The spelling of 3664221378 in words is "three billion, six hundred sixty-four million, two hundred twenty-one thousand, three hundred seventy-eight".