1366550655 has 16 divisors (see below), whose sum is σ = 2186953344. Its totient is φ = 728669600.

The previous prime is 1366550651. The next prime is 1366550663. The reversal of 1366550655 is 5560556631.

It is not a de Polignac number, because 1366550655 - 2² = 1366550651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366550651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105652 + ... + 117878.

It is an arithmetic number, because the mean of its divisors is an integer number (136684584).

Almost surely, 2^1366550655 is an apocalyptic number.

1366550655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1366550655 is a deficient number, since it is larger than the sum of its proper divisors (820402689).

1366550655 is a wasteful number, since it uses less digits than its factorization.

1366550655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19686.

The product of its (nonzero) digits is 405000, while the sum is 42.

The square root of 1366550655 is about 36966.8859251087. The cubic root of 1366550655 is about 1109.7076455932.

The spelling of 1366550655 in words is "one billion, three hundred sixty-six million, five hundred fifty thousand, six hundred fifty-five".