665167637005 has 16 divisors (see below), whose sum is σ = 818214670080. Its totient is φ = 518875953472.

The previous prime is 665167636997. The next prime is 665167637051. The reversal of 665167637005 is 500736761566.

It is a happy number.

665167637005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 665167637005 - 2³ = 665167636997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5197939 + ... + 5324368.

It is an arithmetic number, because the mean of its divisors is an integer number (51138416880).

Almost surely, 2^665167637005 is an apocalyptic number.

It is an amenable number.

665167637005 is a deficient number, since it is larger than the sum of its proper divisors (153047033075).

665167637005 is a wasteful number, since it uses less digits than its factorization.

665167637005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522628.

The product of its (nonzero) digits is 4762800, while the sum is 52.

The spelling of 665167637005 in words is "six hundred sixty-five billion, one hundred sixty-seven million, six hundred thirty-seven thousand, five".