664103121 has 16 divisors (see below), whose sum is σ = 992077248. Its totient is φ = 391608000.

The previous prime is 664103093. The next prime is 664103171. The reversal of 664103121 is 121301466.

664103121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664103121 - 2⁹ = 664102609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664103091 and 664103100.

It is not an unprimeable number, because it can be changed into a prime (664103171) 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, 270730 + ... + 273171.

It is an arithmetic number, because the mean of its divisors is an integer number (62004828).

Almost surely, 2^664103121 is an apocalyptic number.

It is an amenable number.

664103121 is a deficient number, since it is larger than the sum of its proper divisors (327974127).

664103121 is a wasteful number, since it uses less digits than its factorization.

664103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543952.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 664103121 is about 25770.1983112276. The cubic root of 664103121 is about 872.4592947132.

Adding to 664103121 its reverse (121301466), we get a palindrome (785404587).

The spelling of 664103121 in words is "six hundred sixty-four million, one hundred three thousand, one hundred twenty-one".