165720883 has 2 divisors, whose sum is σ = 165720884.
Its totient is φ = 165720882.
The previous prime is 165720881. The next prime is 165720899. The reversal of 165720883 is 388027561.
165720883 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 165720883 - 21 = 165720881 is a prime.
It is a super-2 number, since 2×1657208832 = 54926822124599378, which contains 22 as substring.
Together with 165720881, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (165720881) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82860441 + 82860442.
It is an arithmetic number, because the mean of its divisors is an integer number (82860442).
Almost surely, 2165720883 is an apocalyptic number.
165720883 is a deficient number, since it is larger than the sum of its proper divisors (1).
165720883 is an equidigital number, since it uses as much as digits as its factorization.
165720883 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 80640, while the sum is 40.
The square root of 165720883 is about 12873.2623293398.
The cubic root of 165720883 is about 549.2782632335.
The spelling of 165720883 in words is "one hundred sixty-five million, seven hundred twenty thousand, eight hundred eighty-three".