664075201 has 4 divisors (see below), whose sum is σ = 665195652. Its totient is φ = 662954752.

The previous prime is 664075193. The next prime is 664075229. The reversal of 664075201 is 102570466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 367718976 + 296356225 = 19176^2 + 17215^2 .

It is a cyclic number.

It is not a de Polignac number, because 664075201 - 2³ = 664075193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664075231) 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, 559336 + ... + 560521.

It is an arithmetic number, because the mean of its divisors is an integer number (166298913).

Almost surely, 2^664075201 is an apocalyptic number.

It is an amenable number.

664075201 is a deficient number, since it is larger than the sum of its proper divisors (1120451).

664075201 is a wasteful number, since it uses less digits than its factorization.

664075201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120450.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 664075201 is about 25769.6565945299. The cubic root of 664075201 is about 872.4470679951.

The spelling of 664075201 in words is "six hundred sixty-four million, seventy-five thousand, two hundred one".