6687508861 has 8 divisors (see below), whose sum is σ = 7377436800. Its totient is φ = 6011243040.

The previous prime is 6687508843. The next prime is 6687508879. The reversal of 6687508861 is 1688057866.

It is an interprime number because it is at equal distance from previous prime (6687508843) and next prime (6687508879).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6687508861 - 2⁵ = 6687508829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687508801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3414501 + ... + 3416458.

It is an arithmetic number, because the mean of its divisors is an integer number (922179600).

Almost surely, 2^6687508861 is an apocalyptic number.

It is an amenable number.

6687508861 is a deficient number, since it is larger than the sum of its proper divisors (689927939).

6687508861 is a wasteful number, since it uses less digits than its factorization.

6687508861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831059.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The square root of 6687508861 is about 81777.1903466975. The cubic root of 6687508861 is about 1884.0313429671.

The spelling of 6687508861 in words is "six billion, six hundred eighty-seven million, five hundred eight thousand, eight hundred sixty-one".