77760845320663 has 4 divisors (see below), whose sum is σ = 77764566134200. Its totient is φ = 77757124507128.

The previous prime is 77760845320661. The next prime is 77760845320679. The reversal of 77760845320663 is 36602354806777.

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

It is a cyclic number.

It is not a de Polignac number, because 77760845320663 - 2¹ = 77760845320661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77760845320595 and 77760845320604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77760845320661) 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, 1860375420 + ... + 1860417217.

It is an arithmetic number, because the mean of its divisors is an integer number (19441141533550).

Almost surely, 2^{77760845320663} is an apocalyptic number.

77760845320663 is a deficient number, since it is larger than the sum of its proper divisors (3720813537).

77760845320663 is a wasteful number, since it uses less digits than its factorization.

77760845320663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720813536.

The product of its (nonzero) digits is 213373440, while the sum is 64.

The spelling of 77760845320663 in words is "seventy-seven trillion, seven hundred sixty billion, eight hundred forty-five million, three hundred twenty thousand, six hundred sixty-three".