6650520400000 has 96 divisors (see below), whose sum is σ = 16560295581060. Its totient is φ = 2660208000000.

The previous prime is 6650520399989. The next prime is 6650520400037. The reversal of 6650520400000 is 40250566.

It can be written as a sum of positive squares in 6 ways, for example, as 2561356979776 + 4089163420224 = 1600424^2 + 2022168^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7913151 + ... + 8713150.

Almost surely, 2^{6650520400000} is an apocalyptic number.

It is an amenable number.

6650520400000 is an abundant number, since it is smaller than the sum of its proper divisors (9909775181060).

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

6650520400000 is an frugal number, since it uses more digits than its factorization.

6650520400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16626340 (or 16626308 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 6650520400000 its reverse (40250566), we get a palindrome (6650560650566).

The spelling of 6650520400000 in words is "six trillion, six hundred fifty billion, five hundred twenty million, four hundred thousand".