1366766055 has 20 divisors (see below), whose sum is σ = 2450055432. Its totient is φ = 728941680.

The previous prime is 1366766041. The next prime is 1366766059. The reversal of 1366766055 is 5506676631.

1366766055 is a `hidden beast` number, since 1 + 36 + 6 + 7 + 6 + 605 + 5 = 666.

It is not a de Polignac number, because 1366766055 - 2⁴ = 1366766039 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1366766055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366766059) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1686961 + ... + 1687770.

Almost surely, 2^1366766055 is an apocalyptic number.

1366766055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1366766055 is a deficient number, since it is larger than the sum of its proper divisors (1083289377).

1366766055 is an equidigital number, since it uses as much as digits as its factorization.

1366766055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374748 (or 3374739 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The square root of 1366766055 is about 36969.7992285595. The cubic root of 1366766055 is about 1109.7659477299.

The spelling of 1366766055 in words is "one billion, three hundred sixty-six million, seven hundred sixty-six thousand, fifty-five".