6661510120 has 32 divisors (see below), whose sum is σ = 15336969120. Its totient is φ = 2602635840.

The previous prime is 6661510091. The next prime is 6661510123. The reversal of 6661510120 is 210151666.

It is not an unprimeable number, because it can be changed into a prime (6661510123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1934766 + ... + 1938205.

It is an arithmetic number, because the mean of its divisors is an integer number (479280285).

Almost surely, 2^6661510120 is an apocalyptic number.

It is an amenable number.

6661510120 is an abundant number, since it is smaller than the sum of its proper divisors (8675459000).

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

6661510120 is a wasteful number, since it uses less digits than its factorization.

6661510120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3873025 (or 3873021 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 6661510120 is about 81618.0747138770. The cubic root of 6661510120 is about 1881.5866829779.

Adding to 6661510120 its reverse (210151666), we get a palindrome (6871661786).

The spelling of 6661510120 in words is "six billion, six hundred sixty-one million, five hundred ten thousand, one hundred twenty".