165690326601 has 8 divisors (see below), whose sum is σ = 245467150560. Its totient is φ = 110460217716.

The previous prime is 165690326597. The next prime is 165690326621. The reversal of 165690326601 is 106623096561.

165690326601 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 9 + 0 + 32 + 6 + 601 = 666.

It is not a de Polignac number, because 165690326601 - 2² = 165690326597 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165690326621) 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, 3068339355 + ... + 3068339408.

It is an arithmetic number, because the mean of its divisors is an integer number (30683393820).

Almost surely, 2^165690326601 is an apocalyptic number.

It is an amenable number.

165690326601 is a deficient number, since it is larger than the sum of its proper divisors (79776823959).

165690326601 is an equidigital number, since it uses as much as digits as its factorization.

165690326601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6136678772 (or 6136678766 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 165690326601 in words is "one hundred sixty-five billion, six hundred ninety million, three hundred twenty-six thousand, six hundred one".