2666011521 has 16 divisors (see below), whose sum is σ = 3615073280. Its totient is φ = 1747394640.

The previous prime is 2666011487. The next prime is 2666011571. The reversal of 2666011521 is 1251106662.

It is not a de Polignac number, because 2666011521 - 2¹⁵ = 2665978753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666011571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11916 + ... + 73986.

It is an arithmetic number, because the mean of its divisors is an integer number (225942080).

Almost surely, 2^2666011521 is an apocalyptic number.

It is an amenable number.

2666011521 is a deficient number, since it is larger than the sum of its proper divisors (949061759).

2666011521 is a wasteful number, since it uses less digits than its factorization.

2666011521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62316.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 2666011521 is about 51633.4341391312. The cubic root of 2666011521 is about 1386.6089762414.

The spelling of 2666011521 in words is "two billion, six hundred sixty-six million, eleven thousand, five hundred twenty-one".