6990883878 has 32 divisors (see below), whose sum is σ = 15266581632. Its totient is φ = 2116540800.

The previous prime is 6990883849. The next prime is 6990883901. The reversal of 6990883878 is 8783880996.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26958 + ... + 121278.

It is an arithmetic number, because the mean of its divisors is an integer number (477080676).

Almost surely, 2^6990883878 is an apocalyptic number.

6990883878 is an abundant number, since it is smaller than the sum of its proper divisors (8275697754).

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

6990883878 is a wasteful number, since it uses less digits than its factorization.

6990883878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95460.

The product of its (nonzero) digits is 41803776, while the sum is 66.

The square root of 6990883878 is about 83611.5056556213. The cubic root of 6990883878 is about 1912.1004166010.

The spelling of 6990883878 in words is "six billion, nine hundred ninety million, eight hundred eighty-three thousand, eight hundred seventy-eight".