1366653643 has 2 divisors, whose sum is σ = 1366653644. Its totient is φ = 1366653642.

The previous prime is 1366653611. The next prime is 1366653667. The reversal of 1366653643 is 3463566631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1366653643 - 2⁵ = 1366653611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1366653643.

It is not a weakly prime, because it can be changed into another prime (1366653683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683326821 + 683326822.

It is an arithmetic number, because the mean of its divisors is an integer number (683326822).

Almost surely, 2^1366653643 is an apocalyptic number.

1366653643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366653643 is an equidigital number, since it uses as much as digits as its factorization.

1366653643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 43.

The square root of 1366653643 is about 36968.2788752736. The cubic root of 1366653643 is about 1109.7355220328.

The spelling of 1366653643 in words is "one billion, three hundred sixty-six million, six hundred fifty-three thousand, six hundred forty-three".