1366636254121 has 16 divisors (see below), whose sum is σ = 1404395372160. Its totient is φ = 1329493219200.

The previous prime is 1366636254023. The next prime is 1366636254199. The reversal of 1366636254121 is 1214526366631.

It is a de Polignac number, because none of the positive numbers 2^k-1366636254121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1366636258121) 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 in 15 ways as a sum of consecutive naturals, for example, 1586710 + ... + 2291488.

It is an arithmetic number, because the mean of its divisors is an integer number (87774710760).

Almost surely, 2^{1366636254121} is an apocalyptic number.

It is an amenable number.

1366636254121 is a deficient number, since it is larger than the sum of its proper divisors (37759118039).

1366636254121 is a wasteful number, since it uses less digits than its factorization.

1366636254121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705216.

The product of its digits is 933120, while the sum is 46.

It can be divided in two parts, 136663 and 6254121, that added together give a square (6390784 = 2528²).

The spelling of 1366636254121 in words is "one trillion, three hundred sixty-six billion, six hundred thirty-six million, two hundred fifty-four thousand, one hundred twenty-one".