66938041 has 4 divisors (see below), whose sum is σ = 67046800. Its totient is φ = 66829284.

The previous prime is 66938033. The next prime is 66938071. The reversal of 66938041 is 14083966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66938041 - 2³ = 66938033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66938071) by changing a digit.

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, 53451 + ... + 54688.

It is an arithmetic number, because the mean of its divisors is an integer number (16761700).

Almost surely, 2^66938041 is an apocalyptic number.

It is an amenable number.

66938041 is a deficient number, since it is larger than the sum of its proper divisors (108759).

66938041 is a wasteful number, since it uses less digits than its factorization.

66938041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108758.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 66938041 is about 8181.5671481691. The cubic root of 66938041 is about 406.0295726961.

The spelling of 66938041 in words is "sixty-six million, nine hundred thirty-eight thousand, forty-one".