6685313040 has 180 divisors, whose sum is σ = 26117200044. Its totient is φ = 1528063488.

The previous prime is 6685313017. The next prime is 6685313051. The reversal of 6685313040 is 403135866.

It can be written as a sum of positive squares in 2 ways, for example, as 2863106064 + 3822206976 = 53508^2 + 61824^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6685312986 and 6685313004.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59467 + ... + 130026.

Almost surely, 2^6685313040 is an apocalyptic number.

6685313040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6685313040 is an abundant number, since it is smaller than the sum of its proper divisors (19431887004).

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

6685313040 is a wasteful number, since it uses less digits than its factorization.

6685313040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189526 (or 189510 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 6685313040 is about 81763.7636120060. The cubic root of 6685313040 is about 1883.8251152797.

The spelling of 6685313040 in words is "six billion, six hundred eighty-five million, three hundred thirteen thousand, forty".