6685352491 has 8 divisors (see below), whose sum is σ = 6757350320. Its totient is φ = 6613727328.

The previous prime is 6685352449. The next prime is 6685352501. The reversal of 6685352491 is 1942535866.

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 6685352491 - 2⁹ = 6685351979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6685352591) 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, 57021 + ... + 128926.

It is an arithmetic number, because the mean of its divisors is an integer number (844668790).

Almost surely, 2^6685352491 is an apocalyptic number.

6685352491 is a deficient number, since it is larger than the sum of its proper divisors (71997829).

6685352491 is a wasteful number, since it uses less digits than its factorization.

6685352491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186333.

The product of its digits is 1555200, while the sum is 49.

The square root of 6685352491 is about 81764.0048615526. The cubic root of 6685352491 is about 1883.8288208473.

The spelling of 6685352491 in words is "six billion, six hundred eighty-five million, three hundred fifty-two thousand, four hundred ninety-one".