6685928718345 has 24 divisors (see below), whose sum is σ = 11590633736136. Its totient is φ = 3565308457728.

The previous prime is 6685928718331. The next prime is 6685928718367. The reversal of 6685928718345 is 5438178295866.

It can be written as a sum of positive squares in 4 ways, for example, as 71058498624 + 6614870219721 = 266568^2 + 2571939^2 .

It is not a de Polignac number, because 6685928718345 - 2⁹ = 6685928717833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10525342 + ... + 11142471.

It is an arithmetic number, because the mean of its divisors is an integer number (482943072339).

Almost surely, 2^{6685928718345} is an apocalyptic number.

It is an amenable number.

6685928718345 is a deficient number, since it is larger than the sum of its proper divisors (4904705017791).

6685928718345 is a wasteful number, since it uses less digits than its factorization.

6685928718345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21674681 (or 21674678 counting only the distinct ones).

The product of its digits is 696729600, while the sum is 72.

The spelling of 6685928718345 in words is "six trillion, six hundred eighty-five billion, nine hundred twenty-eight million, seven hundred eighteen thousand, three hundred forty-five".