65980769 has 2 divisors, whose sum is σ = 65980770. Its totient is φ = 65980768.

The previous prime is 65980753. The next prime is 65980777. The reversal of 65980769 is 96708956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65820769 + 160000 = 8113^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 65980769 - 2⁴ = 65980753 is a prime.

It is a super-2 number, since 2×65980769² = 8706923755662722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65980709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32990384 + 32990385.

It is an arithmetic number, because the mean of its divisors is an integer number (32990385).

Almost surely, 2^65980769 is an apocalyptic number.

It is an amenable number.

65980769 is a deficient number, since it is larger than the sum of its proper divisors (1).

65980769 is an equidigital number, since it uses as much as digits as its factorization.

65980769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 65980769 is about 8122.8547321739. The cubic root of 65980769 is about 404.0847471953.

The spelling of 65980769 in words is "sixty-five million, nine hundred eighty thousand, seven hundred sixty-nine".