6685136412 has 12 divisors (see below), whose sum is σ = 15598651656. Its totient is φ = 2228378800.

The previous prime is 6685136399. The next prime is 6685136417. The reversal of 6685136412 is 2146315866.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685136417) 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 3 ways as a sum of consecutive naturals, for example, 278547339 + ... + 278547362.

It is an arithmetic number, because the mean of its divisors is an integer number (1299887638).

Almost surely, 2^6685136412 is an apocalyptic number.

It is an amenable number.

6685136412 is an abundant number, since it is smaller than the sum of its proper divisors (8913515244).

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

6685136412 is a wasteful number, since it uses less digits than its factorization.

6685136412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557094708 (or 557094706 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 6685136412 is about 81762.6834931437. The cubic root of 6685136412 is about 1883.8085247231.

The spelling of 6685136412 in words is "six billion, six hundred eighty-five million, one hundred thirty-six thousand, four hundred twelve".