328378666 has 32 divisors (see below), whose sum is σ = 616574592. Its totient is φ = 127426560.

The previous prime is 328378657. The next prime is 328378669. The reversal of 328378666 is 666873823.

It is not an unprimeable number, because it can be changed into a prime (328378669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35430 + ... + 43726.

It is an arithmetic number, because the mean of its divisors is an integer number (19267956).

Almost surely, 2^328378666 is an apocalyptic number.

328378666 is a deficient number, since it is larger than the sum of its proper divisors (288195926).

328378666 is a wasteful number, since it uses less digits than its factorization.

328378666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8574.

The product of its digits is 1741824, while the sum is 49.

The square root of 328378666 is about 18121.2214268244. The cubic root of 328378666 is about 689.9087367918.

The spelling of 328378666 in words is "three hundred twenty-eight million, three hundred seventy-eight thousand, six hundred sixty-six".