1665660060105 has 16 divisors (see below), whose sum is σ = 2665118304960. Its totient is φ = 888331295808.

The previous prime is 1665660060083. The next prime is 1665660060179. The reversal of 1665660060105 is 5010600665661.

It is not a de Polignac number, because 1665660060105 - 2¹⁴ = 1665660043721 is a prime.

It is a super-2 number, since 2×1665660060105² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620635 + ... + 1927824.

It is an arithmetic number, because the mean of its divisors is an integer number (166569894060).

Almost surely, 2^{1665660060105} is an apocalyptic number.

1665660060105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1665660060105 is a deficient number, since it is larger than the sum of its proper divisors (999458244855).

1665660060105 is a wasteful number, since it uses less digits than its factorization.

1665660060105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592040.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 1665660060105 in words is "one trillion, six hundred sixty-five billion, six hundred sixty million, sixty thousand, one hundred five".