6685461140 has 24 divisors (see below), whose sum is σ = 14865320232. Its totient is φ = 2516879360.

The previous prime is 6685461121. The next prime is 6685461179. The reversal of 6685461140 is 411645866.

It can be written as a sum of positive squares in 4 ways, for example, as 397922704 + 6287538436 = 19948^2 + 79294^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9831221 + ... + 9831900.

It is an arithmetic number, because the mean of its divisors is an integer number (619388343).

Almost surely, 2^6685461140 is an apocalyptic number.

It is an amenable number.

6685461140 is an abundant number, since it is smaller than the sum of its proper divisors (8179859092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6685461140 is a wasteful number, since it uses less digits than its factorization.

6685461140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19663147 (or 19663145 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 6685461140 is about 81764.6692649093. The cubic root of 6685461140 is about 1883.8390259940.

The spelling of 6685461140 in words is "six billion, six hundred eighty-five million, four hundred sixty-one thousand, one hundred forty".