108456661 has 4 divisors (see below), whose sum is σ = 113172192. Its totient is φ = 103741132.

The previous prime is 108456643. The next prime is 108456671. The reversal of 108456661 is 166654801.

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: 166654801 = 1543 ⋅108007.

It is not a de Polignac number, because 108456661 - 2⁵ = 108456629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 108456661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108456671) 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 3 ways as a sum of consecutive naturals, for example, 2357731 + ... + 2357776.

It is an arithmetic number, because the mean of its divisors is an integer number (28293048).

Almost surely, 2^108456661 is an apocalyptic number.

It is an amenable number.

108456661 is a deficient number, since it is larger than the sum of its proper divisors (4715531).

108456661 is an equidigital number, since it uses as much as digits as its factorization.

108456661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715530.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 108456661 is about 10414.2527816450. The cubic root of 108456661 is about 476.8905793227.

The spelling of 108456661 in words is "one hundred eight million, four hundred fifty-six thousand, six hundred sixty-one".