165955803 has 24 divisors (see below), whose sum is σ = 247357440. Its totient is φ = 98822880.

The previous prime is 165955799. The next prime is 165955837. The reversal of 165955803 is 308559561.

165955803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165955803 - 2² = 165955799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165955843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10438 + ... + 20996.

It is an arithmetic number, because the mean of its divisors is an integer number (10306560).

Almost surely, 2^165955803 is an apocalyptic number.

165955803 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165955803 is a deficient number, since it is larger than the sum of its proper divisors (81401637).

165955803 is a wasteful number, since it uses less digits than its factorization.

165955803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10619 (or 10606 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The square root of 165955803 is about 12882.3834363056. The cubic root of 165955803 is about 549.5376864330.

The spelling of 165955803 in words is "one hundred sixty-five million, nine hundred fifty-five thousand, eight hundred three".