664355748 has 48 divisors (see below), whose sum is σ = 1864862720. Its totient is φ = 179825184.

The previous prime is 664355743. The next prime is 664355749. The reversal of 664355748 is 847553466.

It is a junction number, because it is equal to n+sod(n) for n = 664355697 and 664355706.

It is not an unprimeable number, because it can be changed into a prime (664355743) 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, 206536 + ... + 209727.

Almost surely, 2^664355748 is an apocalyptic number.

It is an amenable number.

664355748 is an abundant number, since it is smaller than the sum of its proper divisors (1200506972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664355748 is a wasteful number, since it uses less digits than its factorization.

664355748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416296 (or 416294 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The square root of 664355748 is about 25775.0993790519. The cubic root of 664355748 is about 872.5699094784.

The spelling of 664355748 in words is "six hundred sixty-four million, three hundred fifty-five thousand, seven hundred forty-eight".