66871941 has 8 divisors (see below), whose sum is σ = 92237280. Its totient is φ = 43043952.

The previous prime is 66871933. The next prime is 66871951. The reversal of 66871941 is 14917866.

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

It is not a de Polignac number, because 66871941 - 2³ = 66871933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66871893 and 66871902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66871901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384235 + ... + 384408.

It is an arithmetic number, because the mean of its divisors is an integer number (11529660).

Almost surely, 2^66871941 is an apocalyptic number.

It is an amenable number.

66871941 is a deficient number, since it is larger than the sum of its proper divisors (25365339).

66871941 is a wasteful number, since it uses less digits than its factorization.

66871941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768675.

The product of its digits is 72576, while the sum is 42.

The square root of 66871941 is about 8177.5265820418. The cubic root of 66871941 is about 405.8958799389.

The spelling of 66871941 in words is "sixty-six million, eight hundred seventy-one thousand, nine hundred forty-one".