66245538 has 8 divisors (see below), whose sum is σ = 132491088. Its totient is φ = 22081844.

The previous prime is 66245527. The next prime is 66245551. The reversal of 66245538 is 83554266.

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

66245538 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66245496 and 66245505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5520456 + ... + 5520467.

It is an arithmetic number, because the mean of its divisors is an integer number (16561386).

Almost surely, 2^66245538 is an apocalyptic number.

66245538 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.

66245538 is a wasteful number, since it uses less digits than its factorization.

66245538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11040928.

The product of its digits is 172800, while the sum is 39.

The square root of 66245538 is about 8139.1361949534. The cubic root of 66245538 is about 404.6245323724.

The spelling of 66245538 in words is "sixty-six million, two hundred forty-five thousand, five hundred thirty-eight".