6601608135 has 40 divisors (see below), whose sum is σ = 11864698560. Its totient is φ = 3511722816.

The previous prime is 6601608119. The next prime is 6601608137. The reversal of 6601608135 is 5318061066.

It is a happy number.

It is not a de Polignac number, because 6601608135 - 2⁴ = 6601608119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6601608135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601608137) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 136594 + ... + 178496.

It is an arithmetic number, because the mean of its divisors is an integer number (296617464).

Almost surely, 2^6601608135 is an apocalyptic number.

6601608135 is a deficient number, since it is larger than the sum of its proper divisors (5263090425).

6601608135 is a wasteful number, since it uses less digits than its factorization.

6601608135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42309 (or 42300 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 6601608135 is about 81250.2808302839. The cubic root of 6601608135 is about 1875.9297916504.

The spelling of 6601608135 in words is "six billion, six hundred one million, six hundred eight thousand, one hundred thirty-five".