66962487953 has 2 divisors, whose sum is σ = 66962487954. Its totient is φ = 66962487952.

The previous prime is 66962487947. The next prime is 66962488027. The reversal of 66962487953 is 35978426966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51998593024 + 14963894929 = 228032^2 + 122327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66962487953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66962487953.

It is not a weakly prime, because it can be changed into another prime (66962487253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33481243976 + 33481243977.

It is an arithmetic number, because the mean of its divisors is an integer number (33481243977).

Almost surely, 2^66962487953 is an apocalyptic number.

It is an amenable number.

66962487953 is a deficient number, since it is larger than the sum of its proper divisors (1).

66962487953 is an equidigital number, since it uses as much as digits as its factorization.

66962487953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 65.

The spelling of 66962487953 in words is "sixty-six billion, nine hundred sixty-two million, four hundred eighty-seven thousand, nine hundred fifty-three".