165803745 has 8 divisors (see below), whose sum is σ = 265286016. Its totient is φ = 88428656.

The previous prime is 165803723. The next prime is 165803753. The reversal of 165803745 is 547308561.

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 165803745 - 2⁶ = 165803681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5526777 + ... + 5526806.

It is an arithmetic number, because the mean of its divisors is an integer number (33160752).

Almost surely, 2^165803745 is an apocalyptic number.

165803745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165803745 is a deficient number, since it is larger than the sum of its proper divisors (99482271).

165803745 is a wasteful number, since it uses less digits than its factorization.

165803745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11053591.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 165803745 is about 12876.4803032506. The cubic root of 165803745 is about 549.3697960785.

The spelling of 165803745 in words is "one hundred sixty-five million, eight hundred three thousand, seven hundred forty-five".