66152706689 has 2 divisors, whose sum is σ = 66152706690. Its totient is φ = 66152706688.

The previous prime is 66152706643. The next prime is 66152706709. The reversal of 66152706689 is 98660725166.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63055227664 + 3097479025 = 251108^2 + 55655^2 .

It is a cyclic number.

It is not a de Polignac number, because 66152706689 - 2¹² = 66152702593 is a prime.

It is not a weakly prime, because it can be changed into another prime (66152708689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33076353344 + 33076353345.

It is an arithmetic number, because the mean of its divisors is an integer number (33076353345).

Almost surely, 2^66152706689 is an apocalyptic number.

It is an amenable number.

66152706689 is a deficient number, since it is larger than the sum of its proper divisors (1).

66152706689 is an equidigital number, since it uses as much as digits as its factorization.

66152706689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 66152706689 in words is "sixty-six billion, one hundred fifty-two million, seven hundred six thousand, six hundred eighty-nine".