65984749837 has 2 divisors, whose sum is σ = 65984749838. Its totient is φ = 65984749836.

The previous prime is 65984749823. The next prime is 65984749931. The reversal of 65984749837 is 73894748956.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65912346756 + 72403081 = 256734^2 + 8509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65984749837 is a prime.

It is a super-2 number, since 2×65984749837² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65984749037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32992374918 + 32992374919.

It is an arithmetic number, because the mean of its divisors is an integer number (32992374919).

Almost surely, 2^65984749837 is an apocalyptic number.

It is an amenable number.

65984749837 is a deficient number, since it is larger than the sum of its proper divisors (1).

65984749837 is an equidigital number, since it uses as much as digits as its factorization.

65984749837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 365783040, while the sum is 70.

The spelling of 65984749837 in words is "sixty-five billion, nine hundred eighty-four million, seven hundred forty-nine thousand, eight hundred thirty-seven".