77730777697 has 8 divisors (see below), whose sum is σ = 82111000160. Its totient is φ = 73379468160.

The previous prime is 77730777661. The next prime is 77730777721. The reversal of 77730777697 is 79677703777.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77730777697 - 2²⁷ = 77596559969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77730777637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7222704 + ... + 7233457.

It is an arithmetic number, because the mean of its divisors is an integer number (10263875020).

Almost surely, 2^77730777697 is an apocalyptic number.

It is an amenable number.

77730777697 is a deficient number, since it is larger than the sum of its proper divisors (4380222463).

77730777697 is a wasteful number, since it uses less digits than its factorization.

77730777697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456463.

The product of its (nonzero) digits is 133413966, while the sum is 67.

The spelling of 77730777697 in words is "seventy-seven billion, seven hundred thirty million, seven hundred seventy-seven thousand, six hundred ninety-seven".