77671217677 has 4 divisors (see below), whose sum is σ = 77671809180. Its totient is φ = 77670626176.

The previous prime is 77671217671. The next prime is 77671217699.

77671217677 is nontrivially palindromic in base 10.

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 can be written as a sum of positive squares in 2 ways, for example, as 10074337641 + 67596880036 = 100371^2 + 259994^2 .

It is a cyclic number.

It is not a de Polignac number, because 77671217677 - 2⁷ = 77671217549 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 (77671217671) 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, 598 + ... + 394135.

It is an arithmetic number, because the mean of its divisors is an integer number (19417952295).

Almost surely, 2^77671217677 is an apocalyptic number.

It is an amenable number.

77671217677 is a deficient number, since it is larger than the sum of its proper divisors (591503).

77671217677 is a wasteful number, since it uses less digits than its factorization.

77671217677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591502.

The product of its digits is 8470728, while the sum is 58.

The spelling of 77671217677 in words is "seventy-seven billion, six hundred seventy-one million, two hundred seventeen thousand, six hundred seventy-seven".