165605433 has 8 divisors (see below), whose sum is σ = 252351168. Its totient is φ = 94631664.

The previous prime is 165605431. The next prime is 165605459. The reversal of 165605433 is 334506561.

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

It is not a de Polignac number, because 165605433 - 2¹ = 165605431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165605394 and 165605403.

It is not an unprimeable number, because it can be changed into a prime (165605431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3942966 + ... + 3943007.

It is an arithmetic number, because the mean of its divisors is an integer number (31543896).

Almost surely, 2^165605433 is an apocalyptic number.

It is an amenable number.

165605433 is a deficient number, since it is larger than the sum of its proper divisors (86745735).

165605433 is an equidigital number, since it uses as much as digits as its factorization.

165605433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7885983.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 165605433 is about 12868.7774477609. Note that the first 3 decimals coincide. The cubic root of 165605433 is about 549.1506814306.

The spelling of 165605433 in words is "one hundred sixty-five million, six hundred five thousand, four hundred thirty-three".