66407470489 has 2 divisors, whose sum is σ = 66407470490. Its totient is φ = 66407470488.

The previous prime is 66407470439. The next prime is 66407470561. The reversal of 66407470489 is 98407470466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57153030489 + 9254440000 = 239067^2 + 96200^2 .

It is a cyclic number.

It is not a de Polignac number, because 66407470489 - 2³¹ = 64259986841 is a prime.

It is not a weakly prime, because it can be changed into another prime (66407470439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33203735244 + 33203735245.

It is an arithmetic number, because the mean of its divisors is an integer number (33203735245).

Almost surely, 2^66407470489 is an apocalyptic number.

It is an amenable number.

66407470489 is a deficient number, since it is larger than the sum of its proper divisors (1).

66407470489 is an equidigital number, since it uses as much as digits as its factorization.

66407470489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 66407470489 in words is "sixty-six billion, four hundred seven million, four hundred seventy thousand, four hundred eighty-nine".