1366642049 has 2 divisors, whose sum is σ = 1366642050. Its totient is φ = 1366642048.

The previous prime is 1366642031. The next prime is 1366642063. The reversal of 1366642049 is 9402466631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1366633024 + 9025 = 36968^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366642049 - 2²⁰ = 1365593473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1366641997 and 1366642015.

It is not a weakly prime, because it can be changed into another prime (1366642549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683321024 + 683321025.

It is an arithmetic number, because the mean of its divisors is an integer number (683321025).

Almost surely, 2^1366642049 is an apocalyptic number.

It is an amenable number.

1366642049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366642049 is an equidigital number, since it uses as much as digits as its factorization.

1366642049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 1366642049 is about 36968.1220648277. The cubic root of 1366642049 is about 1109.7323838785.

The spelling of 1366642049 in words is "one billion, three hundred sixty-six million, six hundred forty-two thousand, forty-nine".