1666335534655 has 48 divisors (see below), whose sum is σ = 2314132904160. Its totient is φ = 1147827732480.

The previous prime is 1666335534653. The next prime is 1666335534713. The reversal of 1666335534655 is 5564355336661.

It is not a de Polignac number, because 1666335534655 - 2¹ = 1666335534653 is a prime.

It is a super-2 number, since 2×1666335534655² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1666335534655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666335534653) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57380019 + ... + 57409051.

It is an arithmetic number, because the mean of its divisors is an integer number (48211102170).

Almost surely, 2^{1666335534655} is an apocalyptic number.

1666335534655 is a deficient number, since it is larger than the sum of its proper divisors (647797369505).

1666335534655 is a wasteful number, since it uses less digits than its factorization.

1666335534655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34072 (or 34061 counting only the distinct ones).

The product of its digits is 87480000, while the sum is 58.

The spelling of 1666335534655 in words is "one trillion, six hundred sixty-six billion, three hundred thirty-five million, five hundred thirty-four thousand, six hundred fifty-five".