66120384 has 56 divisors (see below), whose sum is σ = 190853568. Its totient is φ = 20035840.

The previous prime is 66120371. The next prime is 66120419. The reversal of 66120384 is 48302166.

66120384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 13542 + ... + 17765.

Almost surely, 2^66120384 is an apocalyptic number.

66120384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66120384 is an abundant number, since it is smaller than the sum of its proper divisors (124733184).

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

66120384 is a wasteful number, since it uses less digits than its factorization.

66120384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31333 (or 31323 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 66120384 is about 8131.4441521786. Note that the first 3 decimals coincide. The cubic root of 66120384 is about 404.3695602166.

The spelling of 66120384 in words is "sixty-six million, one hundred twenty thousand, three hundred eighty-four".