65888761949 has 2 divisors, whose sum is σ = 65888761950. Its totient is φ = 65888761948.

The previous prime is 65888761853. The next prime is 65888762089. The reversal of 65888761949 is 94916788856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63986232025 + 1902529924 = 252955^2 + 43618^2 .

It is a cyclic number.

It is not a de Polignac number, because 65888761949 - 2²⁴ = 65871984733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65888961949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32944380974 + 32944380975.

It is an arithmetic number, because the mean of its divisors is an integer number (32944380975).

Almost surely, 2^65888761949 is an apocalyptic number.

It is an amenable number.

65888761949 is a deficient number, since it is larger than the sum of its proper divisors (1).

65888761949 is an equidigital number, since it uses as much as digits as its factorization.

65888761949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209018880, while the sum is 71.

The spelling of 65888761949 in words is "sixty-five billion, eight hundred eighty-eight million, seven hundred sixty-one thousand, nine hundred forty-nine".