1366386166 has 4 divisors (see below), whose sum is σ = 2049579252. Its totient is φ = 683193082.

The previous prime is 1366386157. The next prime is 1366386181. The reversal of 1366386166 is 6616836631.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1366386166² = 3734022309272359112, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 341596540 + ... + 341596543.

It is an arithmetic number, because the mean of its divisors is an integer number (512394813).

Almost surely, 2^1366386166 is an apocalyptic number.

1366386166 is a deficient number, since it is larger than the sum of its proper divisors (683193086).

1366386166 is an equidigital number, since it uses as much as digits as its factorization.

1366386166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683193085.

The product of its digits is 559872, while the sum is 46.

The square root of 1366386166 is about 36964.6610426770. The cubic root of 1366386166 is about 1109.6631193684.

The spelling of 1366386166 in words is "one billion, three hundred sixty-six million, three hundred eighty-six thousand, one hundred sixty-six".