1366544461 has 2 divisors, whose sum is σ = 1366544462. Its totient is φ = 1366544460.

The previous prime is 1366544441. The next prime is 1366544477. The reversal of 1366544461 is 1644456631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875035561 + 491508900 = 29581^2 + 22170^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366544461 - 2²¹ = 1364447309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1366544441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683272230 + 683272231.

It is an arithmetic number, because the mean of its divisors is an integer number (683272231).

Almost surely, 2^1366544461 is an apocalyptic number.

It is an amenable number.

1366544461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366544461 is an equidigital number, since it uses as much as digits as its factorization.

1366544461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The square root of 1366544461 is about 36966.8021473321. The cubic root of 1366544461 is about 1109.7059689778.

The spelling of 1366544461 in words is "one billion, three hundred sixty-six million, five hundred forty-four thousand, four hundred sixty-one".