77966466977 has 4 divisors (see below), whose sum is σ = 89104533696. Its totient is φ = 66828400260.

The previous prime is 77966466967. The next prime is 77966466979.

77966466977 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77966466977 - 2⁴ = 77966466961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77966466979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5569033349 + ... + 5569033362.

It is an arithmetic number, because the mean of its divisors is an integer number (22276133424).

Almost surely, 2^77966466977 is an apocalyptic number.

It is an amenable number.

77966466977 is a deficient number, since it is larger than the sum of its proper divisors (11138066719).

77966466977 is a wasteful number, since it uses less digits than its factorization.

77966466977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11138066718.

The product of its digits is 1008189504, while the sum is 74.

The spelling of 77966466977 in words is "seventy-seven billion, nine hundred sixty-six million, four hundred sixty-six thousand, nine hundred seventy-seven".