104663661 has 4 divisors (see below), whose sum is σ = 139551552. Its totient is φ = 69775772.

The previous prime is 104663659. The next prime is 104663683. The reversal of 104663661 is 166366401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166366401 = 3 ⋅55455467.

It is a cyclic number.

It is not a de Polignac number, because 104663661 - 2¹ = 104663659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104663641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17443941 + ... + 17443946.

It is an arithmetic number, because the mean of its divisors is an integer number (34887888).

Almost surely, 2^104663661 is an apocalyptic number.

It is an amenable number.

104663661 is a deficient number, since it is larger than the sum of its proper divisors (34887891).

104663661 is an equidigital number, since it uses as much as digits as its factorization.

104663661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34887890.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 104663661 is about 10230.5259395595. The cubic root of 104663661 is about 471.2651308151.

The spelling of 104663661 in words is "one hundred four million, six hundred sixty-three thousand, six hundred sixty-one".