66389360 has 20 divisors (see below), whose sum is σ = 154355448. Its totient is φ = 26555712.

The previous prime is 66389357. The next prime is 66389399. The reversal of 66389360 is 6398366.

66389360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 414854 + ... + 415013.

Almost surely, 2^66389360 is an apocalyptic number.

It is an amenable number.

66389360 is an abundant number, since it is smaller than the sum of its proper divisors (87966088).

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

66389360 is a wasteful number, since it uses less digits than its factorization.

66389360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829880 (or 829874 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 66389360 is about 8147.9666175065. The cubic root of 66389360 is about 404.9171399861.

The spelling of 66389360 in words is "sixty-six million, three hundred eighty-nine thousand, three hundred sixty".