6661536210 has 96 divisors (see below), whose sum is σ = 19821335040. Its totient is φ = 1520555904.

The previous prime is 6661536209. The next prime is 6661536247. The reversal of 6661536210 is 126351666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 480151 + ... + 493829.

It is an arithmetic number, because the mean of its divisors is an integer number (206472240).

Almost surely, 2^6661536210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6661536210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9910667520).

6661536210 is an abundant number, since it is smaller than the sum of its proper divisors (13159798830).

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

6661536210 is a wasteful number, since it uses less digits than its factorization.

6661536210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14472 (or 14469 counting only the distinct ones).

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

The square root of 6661536210 is about 81618.2345435136. The cubic root of 6661536210 is about 1881.5891394045.

Adding to 6661536210 its reverse (126351666), we get a palindrome (6787887876).

The spelling of 6661536210 in words is "six billion, six hundred sixty-one million, five hundred thirty-six thousand, two hundred ten".