6507800064 has 320 divisors, whose sum is σ = 20034432000. Its totient is φ = 2084659200.

The previous prime is 6507800009. The next prime is 6507800069. The reversal of 6507800064 is 4600087056.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6507800069) 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, 64433614 + ... + 64433714.

It is an arithmetic number, because the mean of its divisors is an integer number (62607600).

Almost surely, 2^6507800064 is an apocalyptic number.

6507800064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6507800064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10017216000).

6507800064 is an abundant number, since it is smaller than the sum of its proper divisors (13526631936).

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

6507800064 is a wasteful number, since it uses less digits than its factorization.

6507800064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 6507800064 is about 80670.9369227853. The cubic root of 6507800064 is about 1867.0017883583.

The spelling of 6507800064 in words is "six billion, five hundred seven million, eight hundred thousand, sixty-four".