165669555 has 8 divisors (see below), whose sum is σ = 265071312. Its totient is φ = 88357088.

The previous prime is 165669533. The next prime is 165669571. The reversal of 165669555 is 555966561.

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

It is a cyclic number.

It is not a de Polignac number, because 165669555 - 2⁵ = 165669523 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5522304 + ... + 5522333.

It is an arithmetic number, because the mean of its divisors is an integer number (33133914).

Almost surely, 2^165669555 is an apocalyptic number.

165669555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165669555 is a deficient number, since it is larger than the sum of its proper divisors (99401757).

165669555 is a wasteful number, since it uses less digits than its factorization.

165669555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044645.

The product of its digits is 1215000, while the sum is 48.

The square root of 165669555 is about 12871.2685854969. The cubic root of 165669555 is about 549.2215488645.

The spelling of 165669555 in words is "one hundred sixty-five million, six hundred sixty-nine thousand, five hundred fifty-five".