664466405 has 16 divisors (see below), whose sum is σ = 802137600. Its totient is φ = 528400320.

The previous prime is 664466399. The next prime is 664466417. The reversal of 664466405 is 504664466.

It is not a de Polignac number, because 664466405 - 2⁸ = 664466149 is a prime.

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, 1007966 + ... + 1008624.

It is an arithmetic number, because the mean of its divisors is an integer number (50133600).

Almost surely, 2^664466405 is an apocalyptic number.

It is an amenable number.

664466405 is a deficient number, since it is larger than the sum of its proper divisors (137671195).

664466405 is a wasteful number, since it uses less digits than its factorization.

664466405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564.

The product of its (nonzero) digits is 414720, while the sum is 41.

The square root of 664466405 is about 25777.2458769357. The cubic root of 664466405 is about 872.6183527050.

The spelling of 664466405 in words is "six hundred sixty-four million, four hundred sixty-six thousand, four hundred five".