667606702152165 has 32 divisors (see below), whose sum is σ = 1073168598675456. Its totient is φ = 354391804019520.

The previous prime is 667606702152127. The next prime is 667606702152209. The reversal of 667606702152165 is 561251207606766.

It is a happy number.

It is not a de Polignac number, because 667606702152165 - 2¹² = 667606702148069 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 667606702152099 and 667606702152108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14205037 + ... + 39204546.

It is an arithmetic number, because the mean of its divisors is an integer number (33536518708608).

Almost surely, 2^{667606702152165} is an apocalyptic number.

It is an amenable number.

667606702152165 is a deficient number, since it is larger than the sum of its proper divisors (405561896523291).

667606702152165 is a wasteful number, since it uses less digits than its factorization.

667606702152165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53413489.

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 667606702152165 in words is "six hundred sixty-seven trillion, six hundred six billion, seven hundred two million, one hundred fifty-two thousand, one hundred sixty-five".