6977813878 has 16 divisors (see below), whose sum is σ = 12591544320. Its totient is φ = 2833097256.

The previous prime is 6977813861. The next prime is 6977813881. The reversal of 6977813878 is 8783187796.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13115926 + ... + 13116457.

It is an arithmetic number, because the mean of its divisors is an integer number (786971520).

Almost surely, 2^6977813878 is an apocalyptic number.

6977813878 is a deficient number, since it is larger than the sum of its proper divisors (5613730442).

6977813878 is a wasteful number, since it uses less digits than its factorization.

6977813878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26232411.

The product of its digits is 28449792, while the sum is 64.

The square root of 6977813878 is about 83533.3099906858. The cubic root of 6977813878 is about 1910.9080665168.

The spelling of 6977813878 in words is "six billion, nine hundred seventy-seven million, eight hundred thirteen thousand, eight hundred seventy-eight".