664535748 has 48 divisors (see below), whose sum is σ = 1590137024. Its totient is φ = 215930880.

The previous prime is 664535743. The next prime is 664535771. The reversal of 664535748 is 847535466.

It is a junction number, because it is equal to n+sod(n) for n = 664535697 and 664535706.

It is not an unprimeable number, because it can be changed into a prime (664535741) 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, 73728 + ... + 82248.

Almost surely, 2^664535748 is an apocalyptic number.

It is an amenable number.

664535748 is an abundant number, since it is smaller than the sum of its proper divisors (925601276).

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

664535748 is a wasteful number, since it uses less digits than its factorization.

664535748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8692 (or 8690 counting only the distinct ones).

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

The square root of 664535748 is about 25778.5908846857. The cubic root of 664535748 is about 872.6487068203.

The spelling of 664535748 in words is "six hundred sixty-four million, five hundred thirty-five thousand, seven hundred forty-eight".