65941256566 has 8 divisors (see below), whose sum is σ = 100533391344. Its totient is φ = 32430126120.

The previous prime is 65941256561. The next prime is 65941256651. The reversal of 65941256566 is 66565214956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×65941256566² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65941256561) 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 in 3 ways as a sum of consecutive naturals, for example, 270250930 + ... + 270251173.

It is an arithmetic number, because the mean of its divisors is an integer number (12566673918).

Almost surely, 2^65941256566 is an apocalyptic number.

65941256566 is a deficient number, since it is larger than the sum of its proper divisors (34592134778).

65941256566 is a wasteful number, since it uses less digits than its factorization.

65941256566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540502166.

The product of its digits is 11664000, while the sum is 55.

The spelling of 65941256566 in words is "sixty-five billion, nine hundred forty-one million, two hundred fifty-six thousand, five hundred sixty-six".