6661326870 has 64 divisors (see below), whose sum is σ = 19378414080. Its totient is φ = 1614866400.

The previous prime is 6661326839. The next prime is 6661326877. The reversal of 6661326870 is 786231666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661326877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1118466 + ... + 1124405.

It is an arithmetic number, because the mean of its divisors is an integer number (302787720).

Almost surely, 2^6661326870 is an apocalyptic number.

6661326870 is an abundant number, since it is smaller than the sum of its proper divisors (12717087210).

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

6661326870 is a wasteful number, since it uses less digits than its factorization.

6661326870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242898 (or 2242892 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 6661326870 is about 81616.9520994260. The cubic root of 6661326870 is about 1881.5694294365.

The spelling of 6661326870 in words is "six billion, six hundred sixty-one million, three hundred twenty-six thousand, eight hundred seventy".