2001100566 has 32 divisors (see below), whose sum is σ = 4241622240. Its totient is φ = 627204096.

The previous prime is 2001100531. The next prime is 2001100597. The reversal of 2001100566 is 6650011002.

It is a happy number.

It is a super-3 number, since 3×2001100566³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106470 + ... + 123846.

It is an arithmetic number, because the mean of its divisors is an integer number (132550695).

Almost surely, 2^2001100566 is an apocalyptic number.

2001100566 is an abundant number, since it is smaller than the sum of its proper divisors (2240521674).

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

2001100566 is a wasteful number, since it uses less digits than its factorization.

2001100566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18528.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2001100566 is about 44733.6625596429. The cubic root of 2001100566 is about 1260.1521118953.

Adding to 2001100566 its reverse (6650011002), we get a palindrome (8651111568).

The spelling of 2001100566 in words is "two billion, one million, one hundred thousand, five hundred sixty-six".