110666116561 has 32 divisors (see below), whose sum is σ = 150804476928. Its totient is φ = 78411896640.

The previous prime is 110666116543. The next prime is 110666116591. The reversal of 110666116561 is 165611666011.

It is not a de Polignac number, because 110666116561 - 2¹⁹ = 110665592273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (110666116501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 757975 + ... + 892108.

It is an arithmetic number, because the mean of its divisors is an integer number (4712639904).

Almost surely, 2^110666116561 is an apocalyptic number.

110666116561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110666116561 is a deficient number, since it is larger than the sum of its proper divisors (40138360367).

110666116561 is a wasteful number, since it uses less digits than its factorization.

110666116561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650181.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 110666116561 in words is "one hundred ten billion, six hundred sixty-six million, one hundred sixteen thousand, five hundred sixty-one".