6600997128 has 64 divisors (see below), whose sum is σ = 18026161920. Its totient is φ = 1997697600.

The previous prime is 6600997127. The next prime is 6600997147. The reversal of 6600997128 is 8217990066.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6600997127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191883 + ... + 223653.

It is an arithmetic number, because the mean of its divisors is an integer number (281658780).

Almost surely, 2^6600997128 is an apocalyptic number.

It is an amenable number.

6600997128 is an abundant number, since it is smaller than the sum of its proper divisors (11425164792).

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

6600997128 is a wasteful number, since it uses less digits than its factorization.

6600997128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32578 (or 32574 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 6600997128 is about 81246.5207131973. The cubic root of 6600997128 is about 1875.8719147627.

The spelling of 6600997128 in words is "six billion, six hundred million, nine hundred ninety-seven thousand, one hundred twenty-eight".