66711941 has 4 divisors (see below), whose sum is σ = 68131392. Its totient is φ = 65292492.

The previous prime is 66711917. The next prime is 66711943. The reversal of 66711941 is 14911766.

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 66711941 - 2¹⁸ = 66449797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66711943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709655 + ... + 709748.

It is an arithmetic number, because the mean of its divisors is an integer number (17032848).

Almost surely, 2^66711941 is an apocalyptic number.

It is an amenable number.

66711941 is a deficient number, since it is larger than the sum of its proper divisors (1419451).

66711941 is a wasteful number, since it uses less digits than its factorization.

66711941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419450.

The product of its digits is 9072, while the sum is 35.

The square root of 66711941 is about 8167.7378141074. The cubic root of 66711941 is about 405.5719014811.

The spelling of 66711941 in words is "sixty-six million, seven hundred eleven thousand, nine hundred forty-one".