667727070344165 has 32 divisors (see below), whose sum is σ = 877545928909440. Its totient is φ = 484726922309376.

The previous prime is 667727070344161. The next prime is 667727070344177. The reversal of 667727070344165 is 561443070727766.

It is a cyclic number.

It is not a de Polignac number, because 667727070344165 - 2² = 667727070344161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667727070344161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301297214 + ... + 303505296.

It is an arithmetic number, because the mean of its divisors is an integer number (27423310278420).

Almost surely, 2^{667727070344165} is an apocalyptic number.

667727070344165 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

667727070344165 is a deficient number, since it is larger than the sum of its proper divisors (209818858565275).

667727070344165 is a wasteful number, since it uses less digits than its factorization.

667727070344165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287013.

The product of its (nonzero) digits is 248935680, while the sum is 65.

The spelling of 667727070344165 in words is "six hundred sixty-seven trillion, seven hundred twenty-seven billion, seventy million, three hundred forty-four thousand, one hundred sixty-five".