65764477 has 2 divisors, whose sum is σ = 65764478. Its totient is φ = 65764476.

The previous prime is 65764471. The next prime is 65764487. The reversal of 65764477 is 77446756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51179716 + 14584761 = 7154^2 + 3819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65764477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65764471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32882238 + 32882239.

It is an arithmetic number, because the mean of its divisors is an integer number (32882239).

Almost surely, 2^65764477 is an apocalyptic number.

It is an amenable number.

65764477 is a deficient number, since it is larger than the sum of its proper divisors (1).

65764477 is an equidigital number, since it uses as much as digits as its factorization.

65764477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 46.

The square root of 65764477 is about 8109.5300110426. The cubic root of 65764477 is about 403.6427195345.

It can be divided in two parts, 657644 and 77, that added together give a square (657721 = 811²).

The spelling of 65764477 in words is "sixty-five million, seven hundred sixty-four thousand, four hundred seventy-seven".