664102441 has 4 divisors (see below), whose sum is σ = 664291984. Its totient is φ = 663912900.

The previous prime is 664102427. The next prime is 664102451. The reversal of 664102441 is 144201466.

664102441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144201466 = 2 ⋅72100733.

It is a cyclic number.

It is not a de Polignac number, because 664102441 - 2⁵ = 664102409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664102451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89415 + ... + 96556.

It is an arithmetic number, because the mean of its divisors is an integer number (166072996).

Almost surely, 2^664102441 is an apocalyptic number.

It is an amenable number.

664102441 is a deficient number, since it is larger than the sum of its proper divisors (189543).

664102441 is a wasteful number, since it uses less digits than its factorization.

664102441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189542.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 664102441 is about 25770.1851176898. The cubic root of 664102441 is about 872.4589969319.

The spelling of 664102441 in words is "six hundred sixty-four million, one hundred two thousand, four hundred forty-one".