66985941 has 16 divisors (see below), whose sum is σ = 97717248. Its totient is φ = 40479600.

The previous prime is 66985909. The next prime is 66985957. The reversal of 66985941 is 14958966.

It is not a de Polignac number, because 66985941 - 2⁵ = 66985909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66985901) 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 15 ways as a sum of consecutive naturals, for example, 9346 + ... + 14876.

It is an arithmetic number, because the mean of its divisors is an integer number (6107328).

Almost surely, 2^66985941 is an apocalyptic number.

It is an amenable number.

66985941 is a deficient number, since it is larger than the sum of its proper divisors (30731307).

66985941 is a wasteful number, since it uses less digits than its factorization.

66985941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5912.

The product of its digits is 466560, while the sum is 48.

The square root of 66985941 is about 8184.4939367074. The cubic root of 66985941 is about 406.1263994480.

The spelling of 66985941 in words is "sixty-six million, nine hundred eighty-five thousand, nine hundred forty-one".