1660110110661 has 16 divisors (see below), whose sum is σ = 2219541209600. Its totient is φ = 1103710125168.

The previous prime is 1660110110653. The next prime is 1660110110671.

1660110110661 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1660110110661 - 2³ = 1660110110653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660110110671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12288600 + ... + 12422958.

It is an arithmetic number, because the mean of its divisors is an integer number (138721325600).

Almost surely, 2^{1660110110661} is an apocalyptic number.

It is an amenable number.

1660110110661 is a deficient number, since it is larger than the sum of its proper divisors (559431098939).

1660110110661 is a wasteful number, since it uses less digits than its factorization.

1660110110661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145608.

The product of its (nonzero) digits is 1296, while the sum is 30.

It can be divided in two parts, 1660110 and 110661, that added together give a palindrome (1770771).

The spelling of 1660110110661 in words is "one trillion, six hundred sixty billion, one hundred ten million, one hundred ten thousand, six hundred sixty-one".