66328068082501 has 2 divisors, whose sum is σ = 66328068082502. Its totient is φ = 66328068082500.

The previous prime is 66328068082487. The next prime is 66328068082559. The reversal of 66328068082501 is 10528086082366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44343213264900 + 21984854817601 = 6659070^2 + 4688801^2 .

It is a cyclic number.

It is not a de Polignac number, because 66328068082501 - 2¹¹ = 66328068080453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66328068082201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33164034041250 + 33164034041251.

It is an arithmetic number, because the mean of its divisors is an integer number (33164034041251).

Almost surely, 2^{66328068082501} is an apocalyptic number.

It is an amenable number.

66328068082501 is a deficient number, since it is larger than the sum of its proper divisors (1).

66328068082501 is an equidigital number, since it uses as much as digits as its factorization.

66328068082501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 66328068082501 in words is "sixty-six trillion, three hundred twenty-eight billion, sixty-eight million, eighty-two thousand, five hundred one".