2011062661 has 4 divisors (see below), whose sum is σ = 2098500192. Its totient is φ = 1923625132.

The previous prime is 2011062643. The next prime is 2011062667. The reversal of 2011062661 is 1662601102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011062661 - 2⁵ = 2011062629 is a prime.

It is a super-3 number, since 3×2011062661³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011062667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43718731 + ... + 43718776.

It is an arithmetic number, because the mean of its divisors is an integer number (524625048).

Almost surely, 2^2011062661 is an apocalyptic number.

It is an amenable number.

2011062661 is a deficient number, since it is larger than the sum of its proper divisors (87437531).

2011062661 is an equidigital number, since it uses as much as digits as its factorization.

2011062661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87437530.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2011062661 is about 44844.8732967326. The cubic root of 2011062661 is about 1262.2397931340.

Adding to 2011062661 its reverse (1662601102), we get a palindrome (3673663763).

The spelling of 2011062661 in words is "two billion, eleven million, sixty-two thousand, six hundred sixty-one".