165666910 has 8 divisors (see below), whose sum is σ = 298200456. Its totient is φ = 66266760.

The previous prime is 165666881. The next prime is 165666929. The reversal of 165666910 is 19666561.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8283336 + ... + 8283355.

It is an arithmetic number, because the mean of its divisors is an integer number (37275057).

Almost surely, 2^165666910 is an apocalyptic number.

165666910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165666910 is a deficient number, since it is larger than the sum of its proper divisors (132533546).

165666910 is a wasteful number, since it uses less digits than its factorization.

165666910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16566698.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 165666910 is about 12871.1658368619. The cubic root of 165666910 is about 549.2186259804.

The spelling of 165666910 in words is "one hundred sixty-five million, six hundred sixty-six thousand, nine hundred ten".