664854443 has 8 divisors (see below), whose sum is σ = 744898800. Its totient is φ = 588077280.

The previous prime is 664854409. The next prime is 664854473. The reversal of 664854443 is 344458466.

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

It is a cyclic number.

It is not a de Polignac number, because 664854443 - 2⁸ = 664854187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664854394 and 664854403.

It is not an unprimeable number, because it can be changed into a prime (664854473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816368 + ... + 817181.

It is an arithmetic number, because the mean of its divisors is an integer number (93112350).

Almost surely, 2^664854443 is an apocalyptic number.

664854443 is a deficient number, since it is larger than the sum of its proper divisors (80044357).

664854443 is a wasteful number, since it uses less digits than its factorization.

664854443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633597.

The product of its digits is 1105920, while the sum is 44.

The square root of 664854443 is about 25784.7715328253. The cubic root of 664854443 is about 872.7881848114.

The spelling of 664854443 in words is "six hundred sixty-four million, eight hundred fifty-four thousand, four hundred forty-three".