1366636140 has 36 divisors (see below), whose sum is σ = 4145463504. Its totient is φ = 364436256.

The previous prime is 1366636129. The next prime is 1366636153. The reversal of 1366636140 is 416366631.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1366636095 and 1366636104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3796032 + ... + 3796391.

It is an arithmetic number, because the mean of its divisors is an integer number (115151764).

Almost surely, 2^1366636140 is an apocalyptic number.

1366636140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1366636140 is an abundant number, since it is smaller than the sum of its proper divisors (2778827364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1366636140 is a wasteful number, since it uses less digits than its factorization.

1366636140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7592438 (or 7592433 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 1366636140 is about 36968.0421445334. The cubic root of 1366636140 is about 1109.7307844794.

The spelling of 1366636140 in words is "one billion, three hundred sixty-six million, six hundred thirty-six thousand, one hundred forty".