66682837 has 18 divisors (see below), whose sum is σ = 76276962. Its totient is φ = 58260384.

The previous prime is 66682813. The next prime is 66682841. The reversal of 66682837 is 73828666.

It can be written as a sum of positive squares in 3 ways, for example, as 7177041 + 59505796 = 2679^2 + 7714^2 .

It is not a de Polignac number, because 66682837 - 2⁷ = 66682709 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 (66682807) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60463 + ... + 61555.

It is an arithmetic number, because the mean of its divisors is an integer number (4237609).

Almost surely, 2^66682837 is an apocalyptic number.

It is an amenable number.

66682837 is a deficient number, since it is larger than the sum of its proper divisors (9594125).

66682837 is a wasteful number, since it uses less digits than its factorization.

66682837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1125 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The square root of 66682837 is about 8165.9559758794. The cubic root of 66682837 is about 405.5129141325.

The spelling of 66682837 in words is "sixty-six million, six hundred eighty-two thousand, eight hundred thirty-seven".