1366905984 has 64 divisors (see below), whose sum is σ = 3657108000. Its totient is φ = 452339712.

The previous prime is 1366905977. The next prime is 1366905997. The reversal of 1366905984 is 4895096631.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40572 + ... + 66180.

Almost surely, 2^1366905984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366905984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828554000).

1366905984 is an abundant number, since it is smaller than the sum of its proper divisors (2290202016).

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

1366905984 is a wasteful number, since it uses less digits than its factorization.

1366905984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25765 (or 25753 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 1366905984 is about 36971.6916572666. The cubic root of 1366905984 is about 1109.8038189124.

The spelling of 1366905984 in words is "one billion, three hundred sixty-six million, nine hundred five thousand, nine hundred eighty-four".