53138666 has 8 divisors (see below), whose sum is σ = 91094880. Its totient is φ = 22773708.

The previous prime is 53138663. The next prime is 53138677. The reversal of 53138666 is 66683135.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53138663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1897796 + ... + 1897823.

It is an arithmetic number, because the mean of its divisors is an integer number (11386860).

Almost surely, 2^53138666 is an apocalyptic number.

53138666 is a deficient number, since it is larger than the sum of its proper divisors (37956214).

53138666 is a wasteful number, since it uses less digits than its factorization.

53138666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795628.

The product of its digits is 77760, while the sum is 38.

The square root of 53138666 is about 7289.6272881403. The cubic root of 53138666 is about 375.9558807823.

The spelling of 53138666 in words is "fifty-three million, one hundred thirty-eight thousand, six hundred sixty-six".