66948085 has 4 divisors (see below), whose sum is σ = 80337708. Its totient is φ = 53558464.

The previous prime is 66948073. The next prime is 66948103. The reversal of 66948085 is 58084966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58084966 = 2 ⋅29042483.

It can be written as a sum of positive squares in 2 ways, for example, as 10608049 + 56340036 = 3257^2 + 7506^2 .

It is a cyclic number.

It is not a de Polignac number, because 66948085 - 2⁵ = 66948053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6694804 + ... + 6694813.

It is an arithmetic number, because the mean of its divisors is an integer number (20084427).

Almost surely, 2^66948085 is an apocalyptic number.

It is an amenable number.

66948085 is a deficient number, since it is larger than the sum of its proper divisors (13389623).

66948085 is a wasteful number, since it uses less digits than its factorization.

66948085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13389622.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 66948085 is about 8182.1809439782. The cubic root of 66948085 is about 406.0498798189.

The spelling of 66948085 in words is "sixty-six million, nine hundred forty-eight thousand, eighty-five".