1366887564 has 36 divisors (see below), whose sum is σ = 3948787024. Its totient is φ = 390539232.

The previous prime is 1366887553. The next prime is 1366887617. The reversal of 1366887564 is 4657886631.

1366887564 is a `hidden beast` number, since 13 + 6 + 68 + 8 + 7 + 564 = 666.

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

It is a super-2 number, since 2×1366887564² = 3736763225235708192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1366887564.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2711827 + ... + 2712330.

Almost surely, 2^1366887564 is an apocalyptic number.

1366887564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1366887564 is an abundant number, since it is smaller than the sum of its proper divisors (2581899460).

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

1366887564 is a wasteful number, since it uses less digits than its factorization.

1366887564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424174 (or 5424169 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 1366887564 is about 36971.4425469172. The cubic root of 1366887564 is about 1109.7988337662.

The spelling of 1366887564 in words is "one billion, three hundred sixty-six million, eight hundred eighty-seven thousand, five hundred sixty-four".