6977137986 has 144 divisors (see below), whose sum is σ = 19323630144. Its totient is φ = 1839809376.

The previous prime is 6977137967. The next prime is 6977137997. The reversal of 6977137986 is 6897317796.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1191181 + ... + 1197023.

It is an arithmetic number, because the mean of its divisors is an integer number (134191876).

Almost surely, 2^6977137986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6977137986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9661815072).

6977137986 is an abundant number, since it is smaller than the sum of its proper divisors (12346492158).

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

6977137986 is an equidigital number, since it uses as much as digits as its factorization.

6977137986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5889 (or 5868 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 63.

The square root of 6977137986 is about 83529.2642491241. The cubic root of 6977137986 is about 1910.8463657606.

The spelling of 6977137986 in words is "six billion, nine hundred seventy-seven million, one hundred thirty-seven thousand, nine hundred eighty-six".