165266766 has 96 divisors (see below), whose sum is σ = 437299200. Its totient is φ = 44089920.

The previous prime is 165266749. The next prime is 165266779. The reversal of 165266766 is 667662561.

165266766 is a `hidden beast` number, since 1 + 6 + 526 + 67 + 66 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112545 + ... + 114003.

It is an arithmetic number, because the mean of its divisors is an integer number (4555200).

Almost surely, 2^165266766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165266766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218649600).

165266766 is an abundant number, since it is smaller than the sum of its proper divisors (272032434).

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

165266766 is a wasteful number, since it uses less digits than its factorization.

165266766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534 (or 1531 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 165266766 is about 12855.6122374627. The cubic root of 165266766 is about 548.7760839472.

The spelling of 165266766 in words is "one hundred sixty-five million, two hundred sixty-six thousand, seven hundred sixty-six".