165798051 has 8 divisors (see below), whose sum is σ = 221141760. Its totient is φ = 110493192.

The previous prime is 165798043. The next prime is 165798079. The reversal of 165798051 is 150897561.

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

It is not a de Polignac number, because 165798051 - 2³ = 165798043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165797994 and 165798012.

It is not an unprimeable number, because it can be changed into a prime (165798041) 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 7 ways as a sum of consecutive naturals, for example, 2410 + ... + 18368.

It is an arithmetic number, because the mean of its divisors is an integer number (27642720).

Almost surely, 2^165798051 is an apocalyptic number.

165798051 is a deficient number, since it is larger than the sum of its proper divisors (55343709).

165798051 is a wasteful number, since it uses less digits than its factorization.

165798051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19425.

The product of its (nonzero) digits is 75600, while the sum is 42.

The square root of 165798051 is about 12876.2592005598. The cubic root of 165798051 is about 549.3635072229.

It can be divided in two parts, 165 and 798051, that added together give a triangular number (798216 = T₁₂₆₃).

The spelling of 165798051 in words is "one hundred sixty-five million, seven hundred ninety-eight thousand, fifty-one".