664336810 has 8 divisors (see below), whose sum is σ = 1195806276. Its totient is φ = 265734720.

The previous prime is 664336769. The next prime is 664336811. The reversal of 664336810 is 18633466.

It can be written as a sum of positive squares in 2 ways, for example, as 656845641 + 7491169 = 25629^2 + 2737^2 .

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

It is a super-2 number, since 2×664336810² = 882686794241952200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664336810.

It is not an unprimeable number, because it can be changed into a prime (664336811) 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 3 ways as a sum of consecutive naturals, for example, 33216831 + ... + 33216850.

Almost surely, 2^664336810 is an apocalyptic number.

664336810 is a deficient number, since it is larger than the sum of its proper divisors (531469466).

664336810 is a wasteful number, since it uses less digits than its factorization.

664336810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66433688.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 664336810 is about 25774.7320063662. The cubic root of 664336810 is about 872.5616182950.

The spelling of 664336810 in words is "six hundred sixty-four million, three hundred thirty-six thousand, eight hundred ten".