66893271 has 8 divisors (see below), whose sum is σ = 90653424. Its totient is φ = 43864320.

The previous prime is 66893207. The next prime is 66893273. The reversal of 66893271 is 17239866.

It is a happy number.

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

It is not a de Polignac number, because 66893271 - 2⁶ = 66893207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66893273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182586 + ... + 182951.

It is an arithmetic number, because the mean of its divisors is an integer number (11331678).

Almost surely, 2^66893271 is an apocalyptic number.

66893271 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66893271 is a deficient number, since it is larger than the sum of its proper divisors (23760153).

66893271 is a wasteful number, since it uses less digits than its factorization.

66893271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365601.

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

The square root of 66893271 is about 8178.8306621424. The cubic root of 66893271 is about 405.9390312648.

It can be divided in two parts, 668 and 93271, that added together give a palindrome (93939).

The spelling of 66893271 in words is "sixty-six million, eight hundred ninety-three thousand, two hundred seventy-one".