165560664 has 64 divisors (see below), whose sum is σ = 426983040. Its totient is φ = 53464320.

The previous prime is 165560663. The next prime is 165560687. The reversal of 165560664 is 466065561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165560663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140799 + ... + 141969.

It is an arithmetic number, because the mean of its divisors is an integer number (6671610).

Almost surely, 2^165560664 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 165560664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213491520).

165560664 is an abundant number, since it is smaller than the sum of its proper divisors (261422376).

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

165560664 is a wasteful number, since it uses less digits than its factorization.

165560664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 165560664 is about 12867.0378875637. The cubic root of 165560664 is about 549.1011920265.

The spelling of 165560664 in words is "one hundred sixty-five million, five hundred sixty thousand, six hundred sixty-four".