664002006 has 32 divisors (see below), whose sum is σ = 1399196160. Its totient is φ = 209490336.

The previous prime is 664001993. The next prime is 664002023. The reversal of 664002006 is 600200466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167560 + ... + 171476.

It is an arithmetic number, because the mean of its divisors is an integer number (43724880).

Almost surely, 2^664002006 is an apocalyptic number.

664002006 is an abundant number, since it is smaller than the sum of its proper divisors (735194154).

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

664002006 is a wasteful number, since it uses less digits than its factorization.

664002006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5428.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 664002006 is about 25768.2363773697. The cubic root of 664002006 is about 872.4150128356.

The spelling of 664002006 in words is "six hundred sixty-four million, two thousand, six".