7700777700 has 144 divisors (see below), whose sum is σ = 27778888704. Its totient is φ = 1600156800.

The previous prime is 7700777663. The next prime is 7700777701. The reversal of 7700777700 is 77770077.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (7700777701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143584 + ... + 189783.

Almost surely, 2^7700777700 is an apocalyptic number.

7700777700 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7700777700 is an abundant number, since it is smaller than the sum of its proper divisors (20078111004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7700777700 is a wasteful number, since it uses less digits than its factorization.

7700777700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333402 (or 333395 counting only the distinct ones).

The product of its (nonzero) digits is 117649, while the sum is 42.

The square root of 7700777700 is about 87754.0751190507. The cubic root of 7700777700 is about 1974.7473008953.

It can be divided in two parts, 770077 and 7700, that added together give a palindrome (777777).

The spelling of 7700777700 in words is "seven billion, seven hundred million, seven hundred seventy-seven thousand, seven hundred".