2006622644 has 24 divisors (see below), whose sum is σ = 3783585960. Its totient is φ = 925674624.

The previous prime is 2006622641. The next prime is 2006622689. The reversal of 2006622644 is 4462266002.

It can be written as a sum of positive squares in 4 ways, for example, as 106708900 + 1899913744 = 10330^2 + 43588^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2006622644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006622641) 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 7 ways as a sum of consecutive naturals, for example, 110822 + ... + 127650.

It is an arithmetic number, because the mean of its divisors is an integer number (157649415).

Almost surely, 2^2006622644 is an apocalyptic number.

It is an amenable number.

2006622644 is a deficient number, since it is larger than the sum of its proper divisors (1776963316).

2006622644 is a wasteful number, since it uses less digits than its factorization.

2006622644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19139 (or 19137 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 2006622644 is about 44795.3417667507. The cubic root of 2006622644 is about 1261.3101858261.

Adding to 2006622644 its reverse (4462266002), we get a palindrome (6468888646).

The spelling of 2006622644 in words is "two billion, six million, six hundred twenty-two thousand, six hundred forty-four".