66982085 has 8 divisors (see below), whose sum is σ = 80498976. Its totient is φ = 53505360.

The previous prime is 66982081. The next prime is 66982109. The reversal of 66982085 is 58028966.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66982085 - 2² = 66982081 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 (66982081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6239 + ... + 13148.

It is an arithmetic number, because the mean of its divisors is an integer number (10062372).

Almost surely, 2^66982085 is an apocalyptic number.

It is an amenable number.

66982085 is a deficient number, since it is larger than the sum of its proper divisors (13516891).

66982085 is a wasteful number, since it uses less digits than its factorization.

66982085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20083.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 66982085 is about 8184.2583659120. The cubic root of 66982085 is about 406.1186065020.

The spelling of 66982085 in words is "sixty-six million, nine hundred eighty-two thousand, eighty-five".