165884434 has 4 divisors (see below), whose sum is σ = 248826654. Its totient is φ = 82942216.

The previous prime is 165884423. The next prime is 165884443. The reversal of 165884434 is 434488561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 92833225 + 73051209 = 9635^2 + 8547^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41471107 + ... + 41471110.

Almost surely, 2^165884434 is an apocalyptic number.

165884434 is a deficient number, since it is larger than the sum of its proper divisors (82942220).

165884434 is an equidigital number, since it uses as much as digits as its factorization.

165884434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82942219.

The product of its digits is 368640, while the sum is 43.

The square root of 165884434 is about 12879.6131153075. The cubic root of 165884434 is about 549.4588992340.

The spelling of 165884434 in words is "one hundred sixty-five million, eight hundred eighty-four thousand, four hundred thirty-four".