6687375081 has 8 divisors (see below), whose sum is σ = 8920669440. Its totient is φ = 4456165392.

The previous prime is 6687375077. The next prime is 6687375103. The reversal of 6687375081 is 1805737866.

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

It is not a de Polignac number, because 6687375081 - 2² = 6687375077 is a prime.

It is a super-2 number, since 2×6687375081² = 89441970947959513122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6687375181) 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, 513666 + ... + 526523.

It is an arithmetic number, because the mean of its divisors is an integer number (1115083680).

Almost surely, 2^6687375081 is an apocalyptic number.

It is an amenable number.

6687375081 is a deficient number, since it is larger than the sum of its proper divisors (2233294359).

6687375081 is a wasteful number, since it uses less digits than its factorization.

6687375081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042335.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 6687375081 is about 81776.3723883617. The cubic root of 6687375081 is about 1884.0187798737.

The spelling of 6687375081 in words is "six billion, six hundred eighty-seven million, three hundred seventy-five thousand, eighty-one".