108128661 has 8 divisors (see below), whose sum is σ = 146535264. Its totient is φ = 70903920.

The previous prime is 108128641. The next prime is 108128663. The reversal of 108128661 is 166821801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 108128661 - 2⁹ = 108128149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108128663) 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, 295251 + ... + 295616.

It is an arithmetic number, because the mean of its divisors is an integer number (18316908).

Almost surely, 2^108128661 is an apocalyptic number.

It is an amenable number.

108128661 is a deficient number, since it is larger than the sum of its proper divisors (38406603).

108128661 is an equidigital number, since it uses as much as digits as its factorization.

108128661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590931.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 108128661 is about 10398.4932081528. The cubic root of 108128661 is about 476.4093485142.

The spelling of 108128661 in words is "one hundred eight million, one hundred twenty-eight thousand, six hundred sixty-one".