664744348 has 24 divisors (see below), whose sum is σ = 1185030000. Its totient is φ = 326222208.

The previous prime is 664744313. The next prime is 664744349. The reversal of 664744348 is 843447466.

It is a junction number, because it is equal to n+sod(n) for n = 664744298 and 664744307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664744349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39528 + ... + 53776.

It is an arithmetic number, because the mean of its divisors is an integer number (49376250).

Almost surely, 2^664744348 is an apocalyptic number.

It is an amenable number.

664744348 is a deficient number, since it is larger than the sum of its proper divisors (520285652).

664744348 is a wasteful number, since it uses less digits than its factorization.

664744348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14469 (or 14467 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 46.

The square root of 664744348 is about 25782.6365602900. The cubic root of 664744348 is about 872.7400063864.

The spelling of 664744348 in words is "six hundred sixty-four million, seven hundred forty-four thousand, three hundred forty-eight".