54138666 has 8 divisors (see below), whose sum is σ = 108277344. Its totient is φ = 18046220.

The previous prime is 54138653. The next prime is 54138697. The reversal of 54138666 is 66683145.

54138666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

54138666 is an admirable 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, 4511550 + ... + 4511561.

It is an arithmetic number, because the mean of its divisors is an integer number (13534668).

Almost surely, 2^54138666 is an apocalyptic number.

54138666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

54138666 is a wasteful number, since it uses less digits than its factorization.

54138666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023116.

The product of its digits is 103680, while the sum is 39.

The square root of 54138666 is about 7357.8982053301. The cubic root of 54138666 is about 378.2995721565.

The spelling of 54138666 in words is "fifty-four million, one hundred thirty-eight thousand, six hundred sixty-six".