65765779 has 2 divisors, whose sum is σ = 65765780. Its totient is φ = 65765778.

The previous prime is 65765729. The next prime is 65765789. The reversal of 65765779 is 97756756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65765779 - 2²³ = 57377171 is a prime.

It is a super-3 number, since 3×65765779³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (65765729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32882889 + 32882890.

It is an arithmetic number, because the mean of its divisors is an integer number (32882890).

Almost surely, 2^65765779 is an apocalyptic number.

65765779 is a deficient number, since it is larger than the sum of its proper divisors (1).

65765779 is an equidigital number, since it uses as much as digits as its factorization.

65765779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2778300, while the sum is 52.

The square root of 65765779 is about 8109.6102865674. The cubic root of 65765779 is about 403.6453832793.

The spelling of 65765779 in words is "sixty-five million, seven hundred sixty-five thousand, seven hundred seventy-nine".