1055605666665 has 16 divisors (see below), whose sum is σ = 1842511709376. Its totient is φ = 511808808000.

The previous prime is 1055605666637. The next prime is 1055605666667. The reversal of 1055605666665 is 5666665065501.

It is not a de Polignac number, because 1055605666665 - 2⁷ = 1055605666537 is a prime.

It is a super-2 number, since 2×1055605666665² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1055605666667) 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 15 ways as a sum of consecutive naturals, for example, 3198804886 + ... + 3198805215.

It is an arithmetic number, because the mean of its divisors is an integer number (115156981836).

Almost surely, 2^{1055605666665} is an apocalyptic number.

1055605666665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1055605666665 is a deficient number, since it is larger than the sum of its proper divisors (786906042711).

1055605666665 is a wasteful number, since it uses less digits than its factorization.

1055605666665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397610120.

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 1055605666665 in words is "one trillion, fifty-five billion, six hundred five million, six hundred sixty-six thousand, six hundred sixty-five".