65956077967 has 4 divisors (see below), whose sum is σ = 71029622440. Its totient is φ = 60882533496.

The previous prime is 65956077961. The next prime is 65956077973. The reversal of 65956077967 is 76977065956.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (65956077961) and next prime (65956077973).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65956077967 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 (65956077961) 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, 2536772217 + ... + 2536772242.

It is an arithmetic number, because the mean of its divisors is an integer number (17757405610).

Almost surely, 2^65956077967 is an apocalyptic number.

65956077967 is a deficient number, since it is larger than the sum of its proper divisors (5073544473).

65956077967 is a wasteful number, since it uses less digits than its factorization.

65956077967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073544472.

The product of its (nonzero) digits is 150028200, while the sum is 67.

The spelling of 65956077967 in words is "sixty-five billion, nine hundred fifty-six million, seventy-seven thousand, nine hundred sixty-seven".