66280000723 has 2 divisors, whose sum is σ = 66280000724. Its totient is φ = 66280000722.

The previous prime is 66280000693. The next prime is 66280000733. The reversal of 66280000723 is 32700008266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66280000723 - 2¹³ = 66279992531 is a prime.

It is not a weakly prime, because it can be changed into another prime (66280000733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33140000361 + 33140000362.

It is an arithmetic number, because the mean of its divisors is an integer number (33140000362).

Almost surely, 2^66280000723 is an apocalyptic number.

66280000723 is a deficient number, since it is larger than the sum of its proper divisors (1).

66280000723 is an equidigital number, since it uses as much as digits as its factorization.

66280000723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

Adding to 66280000723 its reverse (32700008266), we get a palindrome (98980008989).

The spelling of 66280000723 in words is "sixty-six billion, two hundred eighty million, seven hundred twenty-three", and thus it is an aban number.