65966573987 has 2 divisors, whose sum is σ = 65966573988. Its totient is φ = 65966573986.

The previous prime is 65966573929. The next prime is 65966574007. The reversal of 65966573987 is 78937566956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65966573987 - 2¹⁴ = 65966557603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65966573987.

It is not a weakly prime, because it can be changed into another prime (65966573887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32983286993 + 32983286994.

It is an arithmetic number, because the mean of its divisors is an integer number (32983286994).

Almost surely, 2^65966573987 is an apocalyptic number.

65966573987 is a deficient number, since it is larger than the sum of its proper divisors (1).

65966573987 is an equidigital number, since it uses as much as digits as its factorization.

65966573987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 514382400, while the sum is 71.

The spelling of 65966573987 in words is "sixty-five billion, nine hundred sixty-six million, five hundred seventy-three thousand, nine hundred eighty-seven".