66537736829 has 2 divisors, whose sum is σ = 66537736830. Its totient is φ = 66537736828.

The previous prime is 66537736787. The next prime is 66537736861. The reversal of 66537736829 is 92863773566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62039351929 + 4498384900 = 249077^2 + 67070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66537736829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66537732829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33268868414 + 33268868415.

It is an arithmetic number, because the mean of its divisors is an integer number (33268868415).

Almost surely, 2^66537736829 is an apocalyptic number.

It is an amenable number.

66537736829 is a deficient number, since it is larger than the sum of its proper divisors (1).

66537736829 is an equidigital number, since it uses as much as digits as its factorization.

66537736829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 62.

The spelling of 66537736829 in words is "sixty-six billion, five hundred thirty-seven million, seven hundred thirty-six thousand, eight hundred twenty-nine".