66493828801 has 2 divisors, whose sum is σ = 66493828802. Its totient is φ = 66493828800.

The previous prime is 66493828777. The next prime is 66493828813. The reversal of 66493828801 is 10882839466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61466309776 + 5027519025 = 247924^2 + 70905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66493828801 is a prime.

It is not a weakly prime, because it can be changed into another prime (66493828001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33246914400 + 33246914401.

It is an arithmetic number, because the mean of its divisors is an integer number (33246914401).

Almost surely, 2^66493828801 is an apocalyptic number.

It is an amenable number.

66493828801 is a deficient number, since it is larger than the sum of its proper divisors (1).

66493828801 is an equidigital number, since it uses as much as digits as its factorization.

66493828801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 66493828801 in words is "sixty-six billion, four hundred ninety-three million, eight hundred twenty-eight thousand, eight hundred one".