664164403 has 16 divisors (see below), whose sum is σ = 765326016. Its totient is φ = 564595200.

The previous prime is 664164383. The next prime is 664164419. The reversal of 664164403 is 304461466.

664164403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664164403 is a prime.

It is a super-2 number, since 2×664164403² = 882228708424692818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664164433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509853 + ... + 511153.

It is an arithmetic number, because the mean of its divisors is an integer number (47832876).

Almost surely, 2^664164403 is an apocalyptic number.

664164403 is a deficient number, since it is larger than the sum of its proper divisors (101161613).

664164403 is a wasteful number, since it uses less digits than its factorization.

664164403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 664164403 is about 25771.3872928874. The cubic root of 664164403 is about 872.4861301069.

The spelling of 664164403 in words is "six hundred sixty-four million, one hundred sixty-four thousand, four hundred three".