6655489602120 has 384 divisors, whose sum is σ = 23597144195040. Its totient is φ = 1620500152320.

The previous prime is 6655489602053. The next prime is 6655489602127. The reversal of 6655489602120 is 212069845566.

6655489602120 is a `hidden beast` number, since 6 + 6 + 5 + 5 + 4 + 8 + 9 + 602 + 1 + 20 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 1421927462916 + 5233562139204 = 1192446^2 + 2287698^2 .

It is not an unprimeable number, because it can be changed into a prime (6655489602127) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27130252 + ... + 27374468.

Almost surely, 2^{6655489602120} is an apocalyptic number.

6655489602120 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 6655489602120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11798572097520).

6655489602120 is an abundant number, since it is smaller than the sum of its proper divisors (16941654592920).

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

6655489602120 is a wasteful number, since it uses less digits than its factorization.

6655489602120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244385 (or 244378 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 6655489602120 in words is "six trillion, six hundred fifty-five billion, four hundred eighty-nine million, six hundred two thousand, one hundred twenty".