2011002566 has 4 divisors (see below), whose sum is σ = 3016503852. Its totient is φ = 1005501282.

The previous prime is 2011002559. The next prime is 2011002571. The reversal of 2011002566 is 6652001102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6652001102 = 2 ⋅3326000551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502750640 + ... + 502750643.

It is an arithmetic number, because the mean of its divisors is an integer number (754125963).

Almost surely, 2^2011002566 is an apocalyptic number.

2011002566 is a deficient number, since it is larger than the sum of its proper divisors (1005501286).

2011002566 is a wasteful number, since it uses less digits than its factorization.

2011002566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005501285.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2011002566 is about 44844.2032597302. The cubic root of 2011002566 is about 1262.2272201699.

Adding to 2011002566 its reverse (6652001102), we get a palindrome (8663003668).

The spelling of 2011002566 in words is "two billion, eleven million, two thousand, five hundred sixty-six".