6738866788 has 12 divisors (see below), whose sum is σ = 11819285100. Its totient is φ = 3361928192.

The previous prime is 6738866777. The next prime is 6738866809. The reversal of 6738866788 is 8876688376.

It can be written as a sum of positive squares in 2 ways, for example, as 5550548004 + 1188318784 = 74502^2 + 34472^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874281 + ... + 1877872.

It is an arithmetic number, because the mean of its divisors is an integer number (984940425).

Almost surely, 2^6738866788 is an apocalyptic number.

It is an amenable number.

6738866788 is a deficient number, since it is larger than the sum of its proper divisors (5080418312).

6738866788 is a wasteful number, since it uses less digits than its factorization.

6738866788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752606 (or 3752604 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 67.

The square root of 6738866788 is about 82090.6010941569. The cubic root of 6738866788 is about 1888.8419683913.

The spelling of 6738866788 in words is "six billion, seven hundred thirty-eight million, eight hundred sixty-six thousand, seven hundred eighty-eight".