66680073 has 12 divisors (see below), whose sum is σ = 96391360. Its totient is φ = 44418456.

The previous prime is 66680071. The next prime is 66680083. The reversal of 66680073 is 37008666.

It is a happy number.

It is not a de Polignac number, because 66680073 - 2¹ = 66680071 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66680071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14940 + ... + 18882.

Almost surely, 2^66680073 is an apocalyptic number.

It is an amenable number.

66680073 is a deficient number, since it is larger than the sum of its proper divisors (29711287).

66680073 is a wasteful number, since it uses less digits than its factorization.

66680073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828 (or 5825 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66680073 is about 8165.7867349080. The cubic root of 66680073 is about 405.5073112256.

The spelling of 66680073 in words is "sixty-six million, six hundred eighty thousand, seventy-three".