665140245341 has 32 divisors (see below), whose sum is σ = 815050494720. Its totient is φ = 538912355520.

The previous prime is 665140245229. The next prime is 665140245359. The reversal of 665140245341 is 143542041566.

It is a de Polignac number, because none of the positive numbers 2^k-665140245341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665140248341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160985 + ... + 1164558.

It is an arithmetic number, because the mean of its divisors is an integer number (25470327960).

Almost surely, 2^665140245341 is an apocalyptic number.

It is an amenable number.

665140245341 is a deficient number, since it is larger than the sum of its proper divisors (149910249379).

665140245341 is a wasteful number, since it uses less digits than its factorization.

665140245341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325618 (or 1325596 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 665140245341 in words is "six hundred sixty-five billion, one hundred forty million, two hundred forty-five thousand, three hundred forty-one".