1366773345 has 80 divisors (see below), whose sum is σ = 2826405120. Its totient is φ = 618938496.

The previous prime is 1366773337. The next prime is 1366773347. The reversal of 1366773345 is 5433776631.

It is a happy number.

It is not a de Polignac number, because 1366773345 - 2³ = 1366773337 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1366773345.

It is not an unprimeable number, because it can be changed into a prime (1366773347) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 306804 + ... + 311226.

It is an arithmetic number, because the mean of its divisors is an integer number (35330064).

Almost surely, 2^1366773345 is an apocalyptic number.

1366773345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1366773345 is an abundant number, since it is smaller than the sum of its proper divisors (1459631775).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1366773345 is a wasteful number, since it uses less digits than its factorization.

1366773345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556 (or 4547 counting only the distinct ones).

The product of its digits is 952560, while the sum is 45.

The square root of 1366773345 is about 36969.8978224176. The cubic root of 1366773345 is about 1109.7679208009.

The spelling of 1366773345 in words is "one billion, three hundred sixty-six million, seven hundred seventy-three thousand, three hundred forty-five".