2066521265 has 8 divisors (see below), whose sum is σ = 2482888128. Its totient is φ = 1651175280.

The previous prime is 2066521231. The next prime is 2066521283. The reversal of 2066521265 is 5621256602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2066521265 - 2¹² = 2066517169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250757 + ... + 258866.

It is an arithmetic number, because the mean of its divisors is an integer number (310361016).

Almost surely, 2^2066521265 is an apocalyptic number.

It is an amenable number.

2066521265 is a deficient number, since it is larger than the sum of its proper divisors (416366863).

2066521265 is an equidigital number, since it uses as much as digits as its factorization.

2066521265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510439.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 2066521265 is about 45459.0064233701. The cubic root of 2066521265 is about 1273.7375719113.

Adding to 2066521265 its reverse (5621256602), we get a palindrome (7687777867).

The spelling of 2066521265 in words is "two billion, sixty-six million, five hundred twenty-one thousand, two hundred sixty-five".