665424770240 has 56 divisors (see below), whose sum is σ = 1597019546112. Its totient is φ = 264074065920.

The previous prime is 665424770201. The next prime is 665424770249. The reversal of 665424770240 is 42077424566.

It is not an unprimeable number, because it can be changed into a prime (665424770249) 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, 8146181 + ... + 8227460.

Almost surely, 2^665424770240 is an apocalyptic number.

It is an amenable number.

665424770240 is an abundant number, since it is smaller than the sum of its proper divisors (931594775872).

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

665424770240 is a wasteful number, since it uses less digits than its factorization.

665424770240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16373785 (or 16373775 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 47.

The spelling of 665424770240 in words is "six hundred sixty-five billion, four hundred twenty-four million, seven hundred seventy thousand, two hundred forty".