66918468 has 24 divisors (see below), whose sum is σ = 157338720. Its totient is φ = 22135360.

The previous prime is 66918421. The next prime is 66918473. The reversal of 66918468 is 86481966.

66918468 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, 19713 + ... + 22856.

It is an arithmetic number, because the mean of its divisors is an integer number (6555780).

Almost surely, 2^66918468 is an apocalyptic number.

It is an amenable number.

66918468 is an abundant number, since it is smaller than the sum of its proper divisors (90420252).

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

66918468 is a wasteful number, since it uses less digits than its factorization.

66918468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42707 (or 42705 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 66918468 is about 8180.3708962369. The cubic root of 66918468 is about 405.9899938485.

The spelling of 66918468 in words is "sixty-six million, nine hundred eighteen thousand, four hundred sixty-eight".