66662435573 has 2 divisors, whose sum is σ = 66662435574. Its totient is φ = 66662435572.

The previous prime is 66662435527. The next prime is 66662435611. The reversal of 66662435573 is 37553426666.

66662435573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63122542564 + 3539893009 = 251242^2 + 59497^2 .

It is a cyclic number.

It is not a de Polignac number, because 66662435573 - 2¹² = 66662431477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66662435473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33331217786 + 33331217787.

It is an arithmetic number, because the mean of its divisors is an integer number (33331217787).

Almost surely, 2^66662435573 is an apocalyptic number.

It is an amenable number.

66662435573 is a deficient number, since it is larger than the sum of its proper divisors (1).

66662435573 is an equidigital number, since it uses as much as digits as its factorization.

66662435573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 53.

The spelling of 66662435573 in words is "sixty-six billion, six hundred sixty-two million, four hundred thirty-five thousand, five hundred seventy-three".