665358117140 has 24 divisors (see below), whose sum is σ = 1397273871840. Its totient is φ = 266139089568.

The previous prime is 665358117133. The next prime is 665358117143. The reversal of 665358117140 is 41711853566.

It is a happy number.

665358117140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665358117143) 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, 1273139 + ... + 1718021.

It is an arithmetic number, because the mean of its divisors is an integer number (58219744660).

Almost surely, 2^665358117140 is an apocalyptic number.

It is an amenable number.

665358117140 is an abundant number, since it is smaller than the sum of its proper divisors (731915754700).

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

665358117140 is a wasteful number, since it uses less digits than its factorization.

665358117140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519671 (or 519669 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 665358117140 in words is "six hundred sixty-five billion, three hundred fifty-eight million, one hundred seventeen thousand, one hundred forty".