2064446665 has 4 divisors (see below), whose sum is σ = 2477336004. Its totient is φ = 1651557328.

The previous prime is 2064446651. The next prime is 2064446677. The reversal of 2064446665 is 5666444602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 568536336 + 1495910329 = 23844^2 + 38677^2 .

It is a cyclic number.

It is not a de Polignac number, because 2064446665 - 2¹³ = 2064438473 is a prime.

It is a super-3 number, since 3×2064446665³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 206444662 + ... + 206444671.

It is an arithmetic number, because the mean of its divisors is an integer number (619334001).

Almost surely, 2^2064446665 is an apocalyptic number.

It is an amenable number.

2064446665 is a deficient number, since it is larger than the sum of its proper divisors (412889339).

2064446665 is an equidigital number, since it uses as much as digits as its factorization.

2064446665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412889338.

The product of its (nonzero) digits is 829440, while the sum is 43.

The square root of 2064446665 is about 45436.1823330262. The cubic root of 2064446665 is about 1273.3111901814.

The spelling of 2064446665 in words is "two billion, sixty-four million, four hundred forty-six thousand, six hundred sixty-five".