663457040 has 40 divisors (see below), whose sum is σ = 1592302848. Its totient is φ = 256821120.

The previous prime is 663457033. The next prime is 663457043. The reversal of 663457040 is 40754366.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (663457043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131282 + ... + 136241.

Almost surely, 2^663457040 is an apocalyptic number.

It is an amenable number.

663457040 is an abundant number, since it is smaller than the sum of its proper divisors (928845808).

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

663457040 is a wasteful number, since it uses less digits than its factorization.

663457040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267567 (or 267561 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 663457040 is about 25757.6598315918. The cubic root of 663457040 is about 872.1762752800.

The spelling of 663457040 in words is "six hundred sixty-three million, four hundred fifty-seven thousand, forty".