66982017 has 4 divisors (see below), whose sum is σ = 89309360. Its totient is φ = 44654676.

The previous prime is 66981997. The next prime is 66982021. The reversal of 66982017 is 71028966.

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 not a de Polignac number, because 66982017 - 2¹⁰ = 66980993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66982067) 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, 11163667 + ... + 11163672.

It is an arithmetic number, because the mean of its divisors is an integer number (22327340).

Almost surely, 2^66982017 is an apocalyptic number.

It is an amenable number.

66982017 is a deficient number, since it is larger than the sum of its proper divisors (22327343).

66982017 is a wasteful number, since it uses less digits than its factorization.

66982017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22327342.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 66982017 is about 8184.2542115944. The cubic root of 66982017 is about 406.1184690719.

The spelling of 66982017 in words is "sixty-six million, nine hundred eighty-two thousand, seventeen".