1366809618 has 8 divisors (see below), whose sum is σ = 2733619248. Its totient is φ = 455603204.

The previous prime is 1366809611. The next prime is 1366809641. The reversal of 1366809618 is 8169086631.

It is a sphenic number, since it is the product of 3 distinct primes.

1366809618 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1366809611) 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, 113900796 + ... + 113900807.

It is an arithmetic number, because the mean of its divisors is an integer number (341702406).

Almost surely, 2^1366809618 is an apocalyptic number.

1366809618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1366809618 is a wasteful number, since it uses less digits than its factorization.

1366809618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227801608.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1366809618 is about 36970.3883939566. The cubic root of 1366809618 is about 1109.7777381457. Note that the first 4 decimals are identical.

The spelling of 1366809618 in words is "one billion, three hundred sixty-six million, eight hundred nine thousand, six hundred eighteen".