6687339078 has 128 divisors (see below), whose sum is σ = 16020965376. Its totient is φ = 1821312000.

The previous prime is 6687339007. The next prime is 6687339083. The reversal of 6687339078 is 8709337866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21502543 + ... + 21502853.

It is an arithmetic number, because the mean of its divisors is an integer number (125163792).

Almost surely, 2^6687339078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6687339078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8010482688).

6687339078 is an abundant number, since it is smaller than the sum of its proper divisors (9333626298).

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

6687339078 is a wasteful number, since it uses less digits than its factorization.

6687339078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 9144576, while the sum is 57.

The square root of 6687339078 is about 81776.1522572443. The cubic root of 6687339078 is about 1884.0153988536.

The spelling of 6687339078 in words is "six billion, six hundred eighty-seven million, three hundred thirty-nine thousand, seventy-eight".