1366993636 has 12 divisors (see below), whose sum is σ = 2400033328. Its totient is φ = 681269832.

The previous prime is 1366993633. The next prime is 1366993687. The reversal of 1366993636 is 6363996631.

It is not an unprimeable number, because it can be changed into a prime (1366993633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555366 + ... + 557821.

Almost surely, 2^1366993636 is an apocalyptic number.

It is an amenable number.

1366993636 is a deficient number, since it is larger than the sum of its proper divisors (1033039692).

1366993636 is a wasteful number, since it uses less digits than its factorization.

1366993636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113498 (or 1113496 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 52.

The square root of 1366993636 is about 36972.8770316836. The cubic root of 1366993636 is about 1109.8275402329.

The spelling of 1366993636 in words is "one billion, three hundred sixty-six million, nine hundred ninety-three thousand, six hundred thirty-six".