1366140609 has 12 divisors (see below), whose sum is σ = 1976317200. Its totient is φ = 909374424.

The previous prime is 1366140599. The next prime is 1366140617. The reversal of 1366140609 is 9060416631.

1366140609 is a `hidden beast` number, since 1 + 3 + 6 + 6 + 1 + 40 + 609 = 666.

It is not a de Polignac number, because 1366140609 - 2⁵ = 1366140577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1366140649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109239 + ... + 121100.

It is an arithmetic number, because the mean of its divisors is an integer number (164693100).

Almost surely, 2^1366140609 is an apocalyptic number.

It is an amenable number.

1366140609 is a deficient number, since it is larger than the sum of its proper divisors (610176591).

1366140609 is a wasteful number, since it uses less digits than its factorization.

1366140609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231004 (or 231001 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1366140609 is about 36961.3393831988. The cubic root of 1366140609 is about 1109.5966418532.

The spelling of 1366140609 in words is "one billion, three hundred sixty-six million, one hundred forty thousand, six hundred nine".