104065661 has 24 divisors (see below), whose sum is σ = 125527680. Its totient is φ = 85966272.

The previous prime is 104065631. The next prime is 104065691. The reversal of 104065661 is 166560401.

It is an interprime number because it is at equal distance from previous prime (104065631) and next prime (104065691).

It is not a de Polignac number, because 104065661 - 2⁶ = 104065597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104065631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167810 + ... + 168428.

It is an arithmetic number, because the mean of its divisors is an integer number (5230320).

Almost surely, 2^104065661 is an apocalyptic number.

It is an amenable number.

104065661 is a deficient number, since it is larger than the sum of its proper divisors (21462019).

104065661 is an equidigital number, since it uses as much as digits as its factorization.

104065661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 104065661 is about 10201.2578146031. The cubic root of 104065661 is about 470.3658853047.

The spelling of 104065661 in words is "one hundred four million, sixty-five thousand, six hundred sixty-one".