165571206679 has 2 divisors, whose sum is σ = 165571206680. Its totient is φ = 165571206678.

The previous prime is 165571206667. The next prime is 165571206743. The reversal of 165571206679 is 976602175561.

It is a weak prime.

It is an emirp because it is prime and its reverse (976602175561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165571206679 - 2¹⁹ = 165570682391 is a prime.

It is a super-2 number, since 2×165571206679² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165571206179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82785603339 + 82785603340.

It is an arithmetic number, because the mean of its divisors is an integer number (82785603340).

Almost surely, 2^165571206679 is an apocalyptic number.

165571206679 is a deficient number, since it is larger than the sum of its proper divisors (1).

165571206679 is an equidigital number, since it uses as much as digits as its factorization.

165571206679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 55.

It can be divided in two parts, 16557 and 1206679, that added together give a square (1223236 = 1106²).

The spelling of 165571206679 in words is "one hundred sixty-five billion, five hundred seventy-one million, two hundred six thousand, six hundred seventy-nine".