6601606506 has 96 divisors (see below), whose sum is σ = 16610443200. Its totient is φ = 1873808640.

The previous prime is 6601606463. The next prime is 6601606507. The reversal of 6601606506 is 6056061066.

It is not an unprimeable number, because it can be changed into a prime (6601606507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 324960 + ... + 344676.

It is an arithmetic number, because the mean of its divisors is an integer number (173025450).

Almost surely, 2^6601606506 is an apocalyptic number.

6601606506 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6601606506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8305221600).

6601606506 is an abundant number, since it is smaller than the sum of its proper divisors (10008836694).

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

6601606506 is a wasteful number, since it uses less digits than its factorization.

6601606506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19844 (or 19841 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6601606506 is about 81250.2708057025. The cubic root of 6601606506 is about 1875.9296373502.

It can be divided in two parts, 660160 and 6506, that added together give a palindrome (666666).

The spelling of 6601606506 in words is "six billion, six hundred one million, six hundred six thousand, five hundred six".