108756661 has 4 divisors (see below), whose sum is σ = 117122572. Its totient is φ = 100390752.

The previous prime is 108756631. The next prime is 108756671. The reversal of 108756661 is 166657801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28026436 + 80730225 = 5294^2 + 8985^2 .

It is a cyclic number.

It is not a de Polignac number, because 108756661 - 2⁵ = 108756629 is a prime.

It is a super-2 number, since 2×108756661² = 23656022623737842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108756601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4182936 + ... + 4182961.

It is an arithmetic number, because the mean of its divisors is an integer number (29280643).

Almost surely, 2^108756661 is an apocalyptic number.

It is an amenable number.

108756661 is a deficient number, since it is larger than the sum of its proper divisors (8365911).

108756661 is an equidigital number, since it uses as much as digits as its factorization.

108756661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8365910.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 108756661 is about 10428.6461729220. The cubic root of 108756661 is about 477.3298806466.

The spelling of 108756661 in words is "one hundred eight million, seven hundred fifty-six thousand, six hundred sixty-one".