65777373841 has 3 divisors (see below), whose sum is σ = 65777630313. Its totient is φ = 65777117370.

The previous prime is 65777373773. The next prime is 65777373877. The reversal of 65777373841 is 14837377756.

It is a happy number.

The square root of 65777373841 is 256471.

It is a perfect power (a square), and thus also a powerful number.

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 not a de Polignac number, because 65777373841 - 2⁷ = 65777373713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65777379841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 128236 + ... + 384706.

It is an arithmetic number, because the mean of its divisors is an integer number (21925876771).

Almost surely, 2^65777373841 is an apocalyptic number.

65777373841 is the 256471-st square number.

65777373841 is the 128236-th centered octagonal number.

It is an amenable number.

65777373841 is a deficient number, since it is larger than the sum of its proper divisors (256472).

65777373841 is an frugal number, since it uses more digits than its factorization.

65777373841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512942 (or 256471 counting only the distinct ones).

The product of its digits is 20744640, while the sum is 58.

The spelling of 65777373841 in words is "sixty-five billion, seven hundred seventy-seven million, three hundred seventy-three thousand, eight hundred forty-one".