165706422771 has 8 divisors (see below), whose sum is σ = 230548066560. Its totient is φ = 105667863752.

The previous prime is 165706422769. The next prime is 165706422773. The reversal of 165706422771 is 177224607561.

It is an interprime number because it is at equal distance from previous prime (165706422769) and next prime (165706422773).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165706422771 - 2¹ = 165706422769 is a prime.

It is a super-2 number, since 2×165706422771² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165706422771.

It is not an unprimeable number, because it can be changed into a prime (165706422773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200771111 + ... + 1200771248.

It is an arithmetic number, because the mean of its divisors is an integer number (28818508320).

Almost surely, 2^165706422771 is an apocalyptic number.

165706422771 is a deficient number, since it is larger than the sum of its proper divisors (64841643789).

165706422771 is a wasteful number, since it uses less digits than its factorization.

165706422771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401542385.

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 165706422771 in words is "one hundred sixty-five billion, seven hundred six million, four hundred twenty-two thousand, seven hundred seventy-one".