66662437 has 2 divisors, whose sum is σ = 66662438. Its totient is φ = 66662436.

The previous prime is 66662417. The next prime is 66662461. The reversal of 66662437 is 73426666.

66662437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66601921 + 60516 = 8161^2 + 246^2 .

It is a cyclic number.

It is not a de Polignac number, because 66662437 - 2¹¹ = 66660389 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66662437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66662417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33331218 + 33331219.

It is an arithmetic number, because the mean of its divisors is an integer number (33331219).

Almost surely, 2^66662437 is an apocalyptic number.

It is an amenable number.

66662437 is a deficient number, since it is larger than the sum of its proper divisors (1).

66662437 is an equidigital number, since it uses as much as digits as its factorization.

66662437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 40.

The square root of 66662437 is about 8164.7067920410. The cubic root of 66662437 is about 405.4715576279.

The spelling of 66662437 in words is "sixty-six million, six hundred sixty-two thousand, four hundred thirty-seven".