7788668877 has 36 divisors (see below), whose sum is σ = 12333132864. Its totient is φ = 4697375760.

The previous prime is 7788668857. The next prime is 7788668897.

7788668877 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7788668857) and next prime (7788668897).

It is not a de Polignac number, because 7788668877 - 2⁸ = 7788668621 is a prime.

It is a super-2 number, since 2×7788668877² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7788668807) 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 35 ways as a sum of consecutive naturals, for example, 16821948 + ... + 16822410.

It is an arithmetic number, because the mean of its divisors is an integer number (342587024).

Almost surely, 2^7788668877 is an apocalyptic number.

It is an amenable number.

7788668877 is a deficient number, since it is larger than the sum of its proper divisors (4544463987).

7788668877 is a wasteful number, since it uses less digits than its factorization.

7788668877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310 (or 844 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 72.

The square root of 7788668877 is about 88253.4354968689. The cubic root of 7788668877 is about 1982.2316840313.

The spelling of 7788668877 in words is "seven billion, seven hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred seventy-seven".