1366116777 has 54 divisors (see below), whose sum is σ = 2136040686. Its totient is φ = 841155840.

The previous prime is 1366116767. The next prime is 1366116779. The reversal of 1366116777 is 7776116631.

It can be written as a sum of positive squares in 3 ways, for example, as 358117776 + 1007999001 = 18924^2 + 31749^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1366116777 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.

Its product of digits (222264) is a multiple of the sum of its prime divisors (196).

It is not an unprimeable number, because it can be changed into a prime (1366116779) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 12089473 + ... + 12089585.

It is an arithmetic number, because the mean of its divisors is an integer number (39556309).

Almost surely, 2^1366116777 is an apocalyptic number.

It is an amenable number.

1366116777 is a deficient number, since it is larger than the sum of its proper divisors (769923909).

1366116777 is a wasteful number, since it uses less digits than its factorization.

1366116777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 196 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 1366116777 is about 36961.0169908784. The cubic root of 1366116777 is about 1109.5901895986.

The spelling of 1366116777 in words is "one billion, three hundred sixty-six million, one hundred sixteen thousand, seven hundred seventy-seven".