6506678751 has 4 divisors (see below), whose sum is σ = 8675571672. Its totient is φ = 4337785832.

The previous prime is 6506678749. The next prime is 6506678779. The reversal of 6506678751 is 1578766056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6506678751 - 2¹ = 6506678749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6506678694 and 6506678703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506678701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084446456 + ... + 1084446461.

It is an arithmetic number, because the mean of its divisors is an integer number (2168892918).

Almost surely, 2^6506678751 is an apocalyptic number.

6506678751 is a deficient number, since it is larger than the sum of its proper divisors (2168892921).

6506678751 is a wasteful number, since it uses less digits than its factorization.

6506678751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168892920.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The square root of 6506678751 is about 80663.9867041048. The cubic root of 6506678751 is about 1866.8945522413.

The spelling of 6506678751 in words is "six billion, five hundred six million, six hundred seventy-eight thousand, seven hundred fifty-one".