6605397380340 has 768 divisors, whose sum is σ = 23436241920000. Its totient is φ = 1529867243520.

The previous prime is 6605397380291. The next prime is 6605397380371. The reversal of 6605397380340 is 430837935066.

6605397380340 is a `hidden beast` number, since 6 + 6 + 0 + 539 + 73 + 8 + 0 + 34 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 7987179007 + ... + 7987179833.

It is an arithmetic number, because the mean of its divisors is an integer number (30515940000).

Almost surely, 2^{6605397380340} is an apocalyptic number.

6605397380340 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 6605397380340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11718120960000).

6605397380340 is an abundant number, since it is smaller than the sum of its proper divisors (16830844539660).

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

6605397380340 is a wasteful number, since it uses less digits than its factorization.

6605397380340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 6605397380340 in words is "six trillion, six hundred five billion, three hundred ninety-seven million, three hundred eighty thousand, three hundred forty".