65821080751 has 4 divisors (see below), whose sum is σ = 65821760352. Its totient is φ = 65820401152.

The previous prime is 65821080719. The next prime is 65821080763. The reversal of 65821080751 is 15708012856.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65821080751 - 2⁵ = 65821080719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65821080698 and 65821080707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65821080781) 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, 164311 + ... + 398296.

It is an arithmetic number, because the mean of its divisors is an integer number (16455440088).

Almost surely, 2^65821080751 is an apocalyptic number.

65821080751 is a deficient number, since it is larger than the sum of its proper divisors (679601).

65821080751 is a wasteful number, since it uses less digits than its factorization.

65821080751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679600.

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 65821080751 in words is "sixty-five billion, eight hundred twenty-one million, eighty thousand, seven hundred fifty-one".