1966210127055 has 12 divisors (see below), whose sum is σ = 3408097553640. Its totient is φ = 1048645401072.

The previous prime is 1966210127053. The next prime is 1966210127093. The reversal of 1966210127055 is 5507210126691.

It is a happy number.

1966210127055 is a `hidden beast` number, since 1 + 9 + 6 + 621 + 0 + 12 + 7 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 1966210127055 - 2¹ = 1966210127053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 43693558379 = 1966210127055 / (1 + 9 + 6 + 6 + 2 + 1 + 0 + 1 + 2 + 7 + 0 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1966210127055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966210127053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21846779145 + ... + 21846779234.

It is an arithmetic number, because the mean of its divisors is an integer number (284008129470).

Almost surely, 2^{1966210127055} is an apocalyptic number.

1966210127055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1966210127055 is a deficient number, since it is larger than the sum of its proper divisors (1441887426585).

1966210127055 is a wasteful number, since it uses less digits than its factorization.

1966210127055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43693558390 (or 43693558387 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 1966210127055 in words is "one trillion, nine hundred sixty-six billion, two hundred ten million, one hundred twenty-seven thousand, fifty-five".