2006643105 has 64 divisors (see below), whose sum is σ = 3765484800. Its totient is φ = 1011087360.

The previous prime is 2006643103. The next prime is 2006643131. The reversal of 2006643105 is 5013466002.

2006643105 is a `hidden beast` number, since 2 + 0 + 0 + 6 + 643 + 10 + 5 = 666.

It is not a de Polignac number, because 2006643105 - 2¹ = 2006643103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2006643101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1181617 + ... + 1183313.

It is an arithmetic number, because the mean of its divisors is an integer number (58835700).

Almost surely, 2^2006643105 is an apocalyptic number.

It is an amenable number.

2006643105 is a deficient number, since it is larger than the sum of its proper divisors (1758841695).

2006643105 is a wasteful number, since it uses less digits than its factorization.

2006643105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2006643105 is about 44795.5701492904. The cubic root of 2006643105 is about 1261.3144728936.

The spelling of 2006643105 in words is "two billion, six million, six hundred forty-three thousand, one hundred five".