6605397570 has 64 divisors (see below), whose sum is σ = 16413840000. Its totient is φ = 1699224576.

The previous prime is 6605397553. The next prime is 6605397611. The reversal of 6605397570 is 757935066.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1292881 + ... + 1297979.

It is an arithmetic number, because the mean of its divisors is an integer number (256466250).

Almost surely, 2^6605397570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6605397570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8206920000).

6605397570 is an abundant number, since it is smaller than the sum of its proper divisors (9808442430).

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

6605397570 is a wasteful number, since it uses less digits than its factorization.

6605397570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627.

The product of its (nonzero) digits is 1190700, while the sum is 48.

The square root of 6605397570 is about 81273.5970041932. The cubic root of 6605397570 is about 1876.2886614957.

The spelling of 6605397570 in words is "six billion, six hundred five million, three hundred ninety-seven thousand, five hundred seventy".