165422558664 has 768 divisors, whose sum is σ = 557297664000. Its totient is φ = 45265651200.

The previous prime is 165422558663. The next prime is 165422558689. The reversal of 165422558664 is 466855224561.

165422558664 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 22 + 558 + 6 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 165422558664.

It is not an unprimeable number, because it can be changed into a prime (165422558663) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1302539769 + ... + 1302539895.

It is an arithmetic number, because the mean of its divisors is an integer number (725648000).

Almost surely, 2^165422558664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165422558664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278648832000).

165422558664 is an abundant number, since it is smaller than the sum of its proper divisors (391875105336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165422558664 is a wasteful number, since it uses less digits than its factorization.

165422558664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 266 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 54.

The spelling of 165422558664 in words is "one hundred sixty-five billion, four hundred twenty-two million, five hundred fifty-eight thousand, six hundred sixty-four".