664025361 has 8 divisors (see below), whose sum is σ = 886750944. Its totient is φ = 441991680.

The previous prime is 664025303. The next prime is 664025371. The reversal of 664025361 is 163520466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664025361 - 2²⁹ = 127154449 is a prime.

It is a super-3 number, since 3×664025361³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (664025371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170731 + ... + 174576.

It is an arithmetic number, because the mean of its divisors is an integer number (110843868).

Almost surely, 2^664025361 is an apocalyptic number.

It is an amenable number.

664025361 is a deficient number, since it is larger than the sum of its proper divisors (222725583).

664025361 is a wasteful number, since it uses less digits than its factorization.

664025361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345951.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 664025361 is about 25768.6895475886. The cubic root of 664025361 is about 872.4252412253.

The spelling of 664025361 in words is "six hundred sixty-four million, twenty-five thousand, three hundred sixty-one".