7678778767 has 16 divisors (see below), whose sum is σ = 8612964864. Its totient is φ = 6785208000.

The previous prime is 7678778753. The next prime is 7678778791.

7678778767 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7678778767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7678778696 and 7678778705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7678778567) 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 15 ways as a sum of consecutive naturals, for example, 90808 + ... + 153634.

It is an arithmetic number, because the mean of its divisors is an integer number (538310304).

Almost surely, 2^7678778767 is an apocalyptic number.

7678778767 is a deficient number, since it is larger than the sum of its proper divisors (934186097).

7678778767 is a wasteful number, since it uses less digits than its factorization.

7678778767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63150.

The product of its digits is 271063296, while the sum is 70.

The square root of 7678778767 is about 87628.6412481673. The cubic root of 7678778767 is about 1972.8650768524.

The spelling of 7678778767 in words is "seven billion, six hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred sixty-seven".