65375780677 has 4 divisors (see below), whose sum is σ = 65376578176. Its totient is φ = 65374983180.

The previous prime is 65375780671. The next prime is 65375780711. The reversal of 65375780677 is 77608757356.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65375780677 - 2⁷ = 65375780549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65375780671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259599 + ... + 445132.

It is an arithmetic number, because the mean of its divisors is an integer number (16344144544).

Almost surely, 2^65375780677 is an apocalyptic number.

It is an amenable number.

65375780677 is a deficient number, since it is larger than the sum of its proper divisors (797499).

65375780677 is an equidigital number, since it uses as much as digits as its factorization.

65375780677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797498.

The product of its (nonzero) digits is 51861600, while the sum is 61.

The spelling of 65375780677 in words is "sixty-five billion, three hundred seventy-five million, seven hundred eighty thousand, six hundred seventy-seven".