667606137670165 has 32 divisors (see below), whose sum is σ = 855965057310720. Its totient is φ = 498372850730304.

The previous prime is 667606137670163. The next prime is 667606137670207. The reversal of 667606137670165 is 561076731606766.

It is a cyclic number.

It is not a de Polignac number, because 667606137670165 - 2¹ = 667606137670163 is a prime.

It is a super-2 number, since 2×667606137670165² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a self number, because there is not a number n which added to its sum of digits gives 667606137670165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667606137670163) 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, 57626464 + ... + 68235046.

It is an arithmetic number, because the mean of its divisors is an integer number (26748908040960).

Almost surely, 2^{667606137670165} is an apocalyptic number.

It is an amenable number.

667606137670165 is a deficient number, since it is larger than the sum of its proper divisors (188358919640555).

667606137670165 is a wasteful number, since it uses less digits than its factorization.

667606137670165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10618561.

The product of its (nonzero) digits is 240045120, while the sum is 67.

The spelling of 667606137670165 in words is "six hundred sixty-seven trillion, six hundred six billion, one hundred thirty-seven million, six hundred seventy thousand, one hundred sixty-five".