6986857770 has 128 divisors (see below), whose sum is σ = 19370016000. Its totient is φ = 1789966080.

The previous prime is 6986857763. The next prime is 6986857771. The reversal of 6986857770 is 777586896.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6986857698 and 6986857707.

It is not an unprimeable number, because it can be changed into a prime (6986857771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1650016 + ... + 1654244.

It is an arithmetic number, because the mean of its divisors is an integer number (151328250).

Almost surely, 2^6986857770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6986857770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9685008000).

6986857770 is an abundant number, since it is smaller than the sum of its proper divisors (12383158230).

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

6986857770 is a wasteful number, since it uses less digits than its factorization.

6986857770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485 (or 4479 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 63.

The square root of 6986857770 is about 83587.4259084463. The cubic root of 6986857770 is about 1911.7332812843.

The spelling of 6986857770 in words is "six billion, nine hundred eighty-six million, eight hundred fifty-seven thousand, seven hundred seventy".