66011838 has 8 divisors (see below), whose sum is σ = 132023688. Its totient is φ = 22003944.

The previous prime is 66011797. The next prime is 66011887. The reversal of 66011838 is 83811066.

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

66011838 is an admirable number.

It is a super-2 number, since 2×66011838² = 8715125512276488, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66011799 and 66011808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500981 + ... + 5500992.

It is an arithmetic number, because the mean of its divisors is an integer number (16502961).

Almost surely, 2^66011838 is an apocalyptic number.

66011838 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.

66011838 is a wasteful number, since it uses less digits than its factorization.

66011838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001978.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 66011838 is about 8124.7669505039. The cubic root of 66011838 is about 404.1481623346.

The spelling of 66011838 in words is "sixty-six million, eleven thousand, eight hundred thirty-eight".