665143240512 has 56 divisors (see below), whose sum is σ = 1760048860896. Its totient is φ = 221690387968.

The previous prime is 665143240501. The next prime is 665143240571. The reversal of 665143240512 is 215042341566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1634698 + ... + 2000630.

Almost surely, 2^665143240512 is an apocalyptic number.

It is an amenable number.

665143240512 is an abundant number, since it is smaller than the sum of its proper divisors (1094905620384).

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

665143240512 is a wasteful number, since it uses less digits than its factorization.

665143240512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375415 (or 375405 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 665143240512 in words is "six hundred sixty-five billion, one hundred forty-three million, two hundred forty thousand, five hundred twelve".