165252566 has 8 divisors (see below), whose sum is σ = 247972320. Its totient is φ = 82595128.

The previous prime is 165252553. The next prime is 165252587. The reversal of 165252566 is 665252561.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8261 + ... + 19968.

It is an arithmetic number, because the mean of its divisors is an integer number (30996540).

Almost surely, 2^165252566 is an apocalyptic number.

165252566 is a deficient number, since it is larger than the sum of its proper divisors (82719754).

165252566 is a wasteful number, since it uses less digits than its factorization.

165252566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31158.

The product of its digits is 108000, while the sum is 38.

The square root of 165252566 is about 12855.0599376277. The cubic root of 165252566 is about 548.7603662406.

It can be divided in two parts, 16525 and 2566, that added together give a palindrome (19091).

The spelling of 165252566 in words is "one hundred sixty-five million, two hundred fifty-two thousand, five hundred sixty-six".