6655680572400 has 180 divisors, whose sum is σ = 23106889191672. Its totient is φ = 1774092879360.

The previous prime is 6655680572389. The next prime is 6655680572447. The reversal of 6655680572400 is 42750865566.

6655680572400 is a `hidden beast` number, since 6 + 6 + 5 + 5 + 68 + 0 + 572 + 4 + 0 + 0 = 666.

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

It is a congruent number.

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, 8093007 + ... + 8877393.

Almost surely, 2^{6655680572400} is an apocalyptic number.

6655680572400 is a gapful number since it is divisible by the number (60) 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 6655680572400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11553444595836).

6655680572400 is an abundant number, since it is smaller than the sum of its proper divisors (16451208619272).

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

6655680572400 is a wasteful number, since it uses less digits than its factorization.

6655680572400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786768 (or 786754 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 6655680572400 in words is "six trillion, six hundred fifty-five billion, six hundred eighty million, five hundred seventy-two thousand, four hundred".