66706710437 has 2 divisors, whose sum is σ = 66706710438. Its totient is φ = 66706710436.

The previous prime is 66706710419. The next prime is 66706710461. The reversal of 66706710437 is 73401760766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66357244801 + 349465636 = 257599^2 + 18694^2 .

It is a cyclic number.

It is not a de Polignac number, because 66706710437 - 2¹⁰ = 66706709413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66706710391 and 66706710400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66706710337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33353355218 + 33353355219.

It is an arithmetic number, because the mean of its divisors is an integer number (33353355219).

Almost surely, 2^66706710437 is an apocalyptic number.

It is an amenable number.

66706710437 is a deficient number, since it is larger than the sum of its proper divisors (1).

66706710437 is an equidigital number, since it uses as much as digits as its factorization.

66706710437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 66706710437 in words is "sixty-six billion, seven hundred six million, seven hundred ten thousand, four hundred thirty-seven".