2171066070 has 64 divisors (see below), whose sum is σ = 5313600000. Its totient is φ = 567557376.

The previous prime is 2171066047. The next prime is 2171066077. The reversal of 2171066070 is 706601712.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171066077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 722431 + ... + 725429.

It is an arithmetic number, because the mean of its divisors is an integer number (83025000).

Almost surely, 2^2171066070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171066070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2656800000).

2171066070 is an abundant number, since it is smaller than the sum of its proper divisors (3142533930).

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

2171066070 is a wasteful number, since it uses less digits than its factorization.

2171066070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 2171066070 is about 46594.7000204959. The cubic root of 2171066070 is about 1294.8645664680.

Adding to 2171066070 its reverse (706601712), we get a palindrome (2877667782).

The spelling of 2171066070 in words is "two billion, one hundred seventy-one million, sixty-six thousand, seventy".