65948396977 has 2 divisors, whose sum is σ = 65948396978. Its totient is φ = 65948396976.

The previous prime is 65948396947. The next prime is 65948397023. The reversal of 65948396977 is 77969384956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53529300496 + 12419096481 = 231364^2 + 111441^2 .

It is a cyclic number.

It is not a de Polignac number, because 65948396977 - 2³⁵ = 31588658609 is a prime.

It is not a weakly prime, because it can be changed into another prime (65948396947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32974198488 + 32974198489.

It is an arithmetic number, because the mean of its divisors is an integer number (32974198489).

Almost surely, 2^65948396977 is an apocalyptic number.

It is an amenable number.

65948396977 is a deficient number, since it is larger than the sum of its proper divisors (1).

65948396977 is an equidigital number, since it uses as much as digits as its factorization.

65948396977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617258880, while the sum is 73.

The spelling of 65948396977 in words is "sixty-five billion, nine hundred forty-eight million, three hundred ninety-six thousand, nine hundred seventy-seven".