165006601 has 2 divisors, whose sum is σ = 165006602. Its totient is φ = 165006600.

The previous prime is 165006599. The next prime is 165006617. The reversal of 165006601 is 106600561.

165006601 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 can be written as a sum of positive squares in only one way, i.e., 115670025 + 49336576 = 10755^2 + 7024^2 .

It is a cyclic number.

It is not a de Polignac number, because 165006601 - 2¹ = 165006599 is a prime.

Together with 165006599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (165006631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82503300 + 82503301.

It is an arithmetic number, because the mean of its divisors is an integer number (82503301).

Almost surely, 2^165006601 is an apocalyptic number.

It is an amenable number.

165006601 is a deficient number, since it is larger than the sum of its proper divisors (1).

165006601 is an equidigital number, since it uses as much as digits as its factorization.

165006601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 165006601 is about 12845.4895196719. The cubic root of 165006601 is about 548.4879693292.

The spelling of 165006601 in words is "one hundred sixty-five million, six thousand, six hundred one".