6605645346 has 48 divisors (see below), whose sum is σ = 14820319800. Its totient is φ = 2123864064.

The previous prime is 6605645339. The next prime is 6605645351. The reversal of 6605645346 is 6435465066.

6605645346 is a `hidden beast` number, since 6 + 60 + 56 + 4 + 534 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3586692321 + 3018953025 = 59889^2 + 54945^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 577410 + ... + 588738.

Almost surely, 2^6605645346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6605645346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7410159900).

6605645346 is an abundant number, since it is smaller than the sum of its proper divisors (8214674454).

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

6605645346 is a wasteful number, since it uses less digits than its factorization.

6605645346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12483 (or 12480 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The square root of 6605645346 is about 81275.1213225794. The cubic root of 6605645346 is about 1876.3121217786.

The spelling of 6605645346 in words is "six billion, six hundred five million, six hundred forty-five thousand, three hundred forty-six".