65771908377 has 16 divisors (see below), whose sum is σ = 100231738752. Its totient is φ = 37580993280.

The previous prime is 65771908357. The next prime is 65771908387. The reversal of 65771908377 is 77380917756.

It is not a de Polignac number, because 65771908377 - 2⁷ = 65771908249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65771908377.

It is not an unprimeable number, because it can be changed into a prime (65771908337) 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 in 15 ways as a sum of consecutive naturals, for example, 166227 + ... + 398967.

It is an arithmetic number, because the mean of its divisors is an integer number (6264483672).

Almost surely, 2^65771908377 is an apocalyptic number.

It is an amenable number.

65771908377 is a deficient number, since it is larger than the sum of its proper divisors (34459830375).

65771908377 is a wasteful number, since it uses less digits than its factorization.

65771908377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246208.

The product of its (nonzero) digits is 15558480, while the sum is 60.

The spelling of 65771908377 in words is "sixty-five billion, seven hundred seventy-one million, nine hundred eight thousand, three hundred seventy-seven".