1356165566 has 16 divisors (see below), whose sum is σ = 2327706720. Its totient is φ = 580500960.

The previous prime is 1356165557. The next prime is 1356165581. The reversal of 1356165566 is 6655616531.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 47501 + ... + 70488.

It is an arithmetic number, because the mean of its divisors is an integer number (145481670).

Almost surely, 2^1356165566 is an apocalyptic number.

1356165566 is a deficient number, since it is larger than the sum of its proper divisors (971541154).

1356165566 is a wasteful number, since it uses less digits than its factorization.

1356165566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118819.

The product of its digits is 486000, while the sum is 44.

The square root of 1356165566 is about 36826.1532881185. The cubic root of 1356165566 is about 1106.8894234943.

The spelling of 1356165566 in words is "one billion, three hundred fifty-six million, one hundred sixty-five thousand, five hundred sixty-six".