65607278377 has 2 divisors, whose sum is σ = 65607278378. Its totient is φ = 65607278376.

The previous prime is 65607278353. The next prime is 65607278413. The reversal of 65607278377 is 77387270656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58620157456 + 6987120921 = 242116^2 + 83589^2 .

It is a cyclic number.

It is not a de Polignac number, because 65607278377 - 2⁷ = 65607278249 is a prime.

It is not a weakly prime, because it can be changed into another prime (65607272377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32803639188 + 32803639189.

It is an arithmetic number, because the mean of its divisors is an integer number (32803639189).

Almost surely, 2^65607278377 is an apocalyptic number.

It is an amenable number.

65607278377 is a deficient number, since it is larger than the sum of its proper divisors (1).

65607278377 is an equidigital number, since it uses as much as digits as its factorization.

65607278377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20744640, while the sum is 58.

It can be divided in two parts, 656072 and 78377, that added together give a square (734449 = 857²).

The spelling of 65607278377 in words is "sixty-five billion, six hundred seven million, two hundred seventy-eight thousand, three hundred seventy-seven".