66271938 has 8 divisors (see below), whose sum is σ = 132543888. Its totient is φ = 22090644.

The previous prime is 66271903. The next prime is 66271963. The reversal of 66271938 is 83917266.

It is a happy number.

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

66271938 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66271938.

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, 5522656 + ... + 5522667.

It is an arithmetic number, because the mean of its divisors is an integer number (16567986).

Almost surely, 2^66271938 is an apocalyptic number.

66271938 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.

66271938 is a wasteful number, since it uses less digits than its factorization.

66271938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11045328.

The product of its digits is 108864, while the sum is 42.

The square root of 66271938 is about 8140.7578271313. The cubic root of 66271938 is about 404.6782752070.

The spelling of 66271938 in words is "sixty-six million, two hundred seventy-one thousand, nine hundred thirty-eight".