145668165 has 16 divisors (see below), whose sum is σ = 233539200. Its totient is φ = 77532992.

The previous prime is 145668161. The next prime is 145668197. The reversal of 145668165 is 561866541.

It is a cyclic number.

It is not a de Polignac number, because 145668165 - 2² = 145668161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145668161) 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, 1905 + ... + 17174.

It is an arithmetic number, because the mean of its divisors is an integer number (14596200).

Almost surely, 2^145668165 is an apocalyptic number.

145668165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145668165 is a deficient number, since it is larger than the sum of its proper divisors (87871035).

145668165 is a wasteful number, since it uses less digits than its factorization.

145668165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19596.

The product of its digits is 172800, while the sum is 42.

The square root of 145668165 is about 12069.3067323687. The cubic root of 145668165 is about 526.1645080531.

The spelling of 145668165 in words is "one hundred forty-five million, six hundred sixty-eight thousand, one hundred sixty-five".