65725612077 has 4 divisors (see below), whose sum is σ = 87634149440. Its totient is φ = 43817074716.

The previous prime is 65725612063. The next prime is 65725612081. The reversal of 65725612077 is 77021652756.

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 de Polignac number, because none of the positive numbers 2^k-65725612077 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 (65725612027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10954268677 + ... + 10954268682.

It is an arithmetic number, because the mean of its divisors is an integer number (21908537360).

Almost surely, 2^65725612077 is an apocalyptic number.

It is an amenable number.

65725612077 is a deficient number, since it is larger than the sum of its proper divisors (21908537363).

65725612077 is a wasteful number, since it uses less digits than its factorization.

65725612077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21908537362.

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 65725612077 in words is "sixty-five billion, seven hundred twenty-five million, six hundred twelve thousand, seventy-seven".