664467075 has 36 divisors (see below), whose sum is σ = 1194869208. Its totient is φ = 352972800.

The previous prime is 664467047. The next prime is 664467077. The reversal of 664467075 is 570764466.

It is a happy number.

It is not a de Polignac number, because 664467075 - 2⁸ = 664466819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 664467075.

It is not an unprimeable number, because it can be changed into a prime (664467077) 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 35 ways as a sum of consecutive naturals, for example, 52080 + ... + 63570.

Almost surely, 2^664467075 is an apocalyptic number.

664467075 is a deficient number, since it is larger than the sum of its proper divisors (530402133).

664467075 is a wasteful number, since it uses less digits than its factorization.

664467075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11764 (or 11756 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The square root of 664467075 is about 25777.2588728903. The cubic root of 664467075 is about 872.6186460000.

The spelling of 664467075 in words is "six hundred sixty-four million, four hundred sixty-seven thousand, seventy-five".