6680627581 has 8 divisors (see below), whose sum is σ = 7207070904. Its totient is φ = 6169013760.

The previous prime is 6680627573. The next prime is 6680627593. The reversal of 6680627581 is 1857260866.

It can be written as a sum of positive squares in 4 ways, for example, as 4582071481 + 2098556100 = 67691^2 + 45810^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6680627581 - 2³ = 6680627573 is a prime.

It is a super-2 number, since 2×6680627581² = 89261569752035823122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6680627501) 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 7 ways as a sum of consecutive naturals, for example, 3706440 + ... + 3708241.

It is an arithmetic number, because the mean of its divisors is an integer number (900883863).

Almost surely, 2^6680627581 is an apocalyptic number.

It is an amenable number.

6680627581 is a deficient number, since it is larger than the sum of its proper divisors (526443323).

6680627581 is a wasteful number, since it uses less digits than its factorization.

6680627581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414751.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 6680627581 is about 81735.1061723174. The cubic root of 6680627581 is about 1883.3849140927.

The spelling of 6680627581 in words is "six billion, six hundred eighty million, six hundred twenty-seven thousand, five hundred eighty-one".