165803798 has 4 divisors (see below), whose sum is σ = 248705700. Its totient is φ = 82901898.

The previous prime is 165803797. The next prime is 165803801. The reversal of 165803798 is 897308561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 897308561 = 257 ⋅3491473.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165803797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41450948 + ... + 41450951.

It is an arithmetic number, because the mean of its divisors is an integer number (62176425).

Almost surely, 2^165803798 is an apocalyptic number.

165803798 is a deficient number, since it is larger than the sum of its proper divisors (82901902).

165803798 is an equidigital number, since it uses as much as digits as its factorization.

165803798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82901901.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 165803798 is about 12876.4823612662. The cubic root of 165803798 is about 549.3698546148.

The spelling of 165803798 in words is "one hundred sixty-five million, eight hundred three thousand, seven hundred ninety-eight".