6685420753605 has 32 divisors (see below), whose sum is σ = 11671149409920. Its totient is φ = 3240846298880.

The previous prime is 6685420753601. The next prime is 6685420753631. The reversal of 6685420753605 is 5063570245866.

It is not a de Polignac number, because 6685420753605 - 2² = 6685420753601 is a prime.

It is a super-2 number, since 2×6685420753605² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685420753601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2619210 + ... + 4497899.

It is an arithmetic number, because the mean of its divisors is an integer number (364723419060).

Almost surely, 2^{6685420753605} is an apocalyptic number.

It is an amenable number.

6685420753605 is a deficient number, since it is larger than the sum of its proper divisors (4985728656315).

6685420753605 is a wasteful number, since it uses less digits than its factorization.

6685420753605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122821.

The product of its (nonzero) digits is 36288000, while the sum is 57.

The spelling of 6685420753605 in words is "six trillion, six hundred eighty-five billion, four hundred twenty million, seven hundred fifty-three thousand, six hundred five".