664884331 has 8 divisors (see below), whose sum is σ = 721166544. Its totient is φ = 610510080.

The previous prime is 664884317. The next prime is 664884383. The reversal of 664884331 is 133488466.

664884331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664884331 is a prime.

It is a super-2 number, since 2×664884331² = 884142347218635122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664884431) 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, 476265 + ... + 477658.

It is an arithmetic number, because the mean of its divisors is an integer number (90145818).

Almost surely, 2^664884331 is an apocalyptic number.

664884331 is a deficient number, since it is larger than the sum of its proper divisors (56282213).

664884331 is a wasteful number, since it uses less digits than its factorization.

664884331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953981.

The product of its digits is 331776, while the sum is 43.

The square root of 664884331 is about 25785.3510932079. The cubic root of 664884331 is about 872.8012631138.

The spelling of 664884331 in words is "six hundred sixty-four million, eight hundred eighty-four thousand, three hundred thirty-one".