66412637 has 2 divisors, whose sum is σ = 66412638. Its totient is φ = 66412636.

The previous prime is 66412631. The next prime is 66412663. The reversal of 66412637 is 73621466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 3511876 = 7931^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 66412637 - 2⁶ = 66412573 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66412597 and 66412606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66412631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33206318 + 33206319.

It is an arithmetic number, because the mean of its divisors is an integer number (33206319).

Almost surely, 2^66412637 is an apocalyptic number.

It is an amenable number.

66412637 is a deficient number, since it is larger than the sum of its proper divisors (1).

66412637 is an equidigital number, since it uses as much as digits as its factorization.

66412637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 66412637 is about 8149.3948855114. The cubic root of 66412637 is about 404.9644575831.

The spelling of 66412637 in words is "sixty-six million, four hundred twelve thousand, six hundred thirty-seven".