664466406 has 16 divisors (see below), whose sum is σ = 1354007664. Its totient is φ = 217309664.

The previous prime is 664466399. The next prime is 664466417. The reversal of 664466406 is 604664466.

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 7 ways as a sum of consecutive naturals, for example, 1044441 + ... + 1045076.

It is an arithmetic number, because the mean of its divisors is an integer number (84625479).

Almost surely, 2^664466406 is an apocalyptic number.

664466406 is an abundant number, since it is smaller than the sum of its proper divisors (689541258).

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

664466406 is a wasteful number, since it uses less digits than its factorization.

664466406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089575.

The product of its (nonzero) digits is 497664, while the sum is 42.

The square root of 664466406 is about 25777.2458963327. The cubic root of 664466406 is about 872.6183531427.

The spelling of 664466406 in words is "six hundred sixty-four million, four hundred sixty-six thousand, four hundred six".