1660806898111 has 2 divisors, whose sum is σ = 1660806898112. Its totient is φ = 1660806898110.

The previous prime is 1660806898109. The next prime is 1660806898117. The reversal of 1660806898111 is 1118986080661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1660806898111 - 2¹ = 1660806898109 is a prime.

Together with 1660806898109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660806898117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830403449055 + 830403449056.

It is an arithmetic number, because the mean of its divisors is an integer number (830403449056).

Almost surely, 2^{1660806898111} is an apocalyptic number.

1660806898111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660806898111 is an equidigital number, since it uses as much as digits as its factorization.

1660806898111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 55.

It can be divided in two parts, 1660806898 and 111, that added together give a square (1660807009 = 40753²).

The spelling of 1660806898111 in words is "one trillion, six hundred sixty billion, eight hundred six million, eight hundred ninety-eight thousand, one hundred eleven".