2066664065 has 16 divisors (see below), whose sum is σ = 2545760448. Its totient is φ = 1609734336.

The previous prime is 2066664059. The next prime is 2066664071. The reversal of 2066664065 is 5604666602.

It is an interprime number because it is at equal distance from previous prime (2066664059) and next prime (2066664071).

It is a cyclic number.

It is not a de Polignac number, because 2066664065 - 2⁴ = 2066664049 is a prime.

It is a super-2 number, since 2×2066664065² = 8542200715124648450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52994 + ... + 83316.

It is an arithmetic number, because the mean of its divisors is an integer number (159110028).

Almost surely, 2^2066664065 is an apocalyptic number.

It is an amenable number.

2066664065 is a deficient number, since it is larger than the sum of its proper divisors (479096383).

2066664065 is a wasteful number, since it uses less digits than its factorization.

2066664065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30688.

The product of its (nonzero) digits is 311040, while the sum is 41.

The square root of 2066664065 is about 45460.5770420922. The cubic root of 2066664065 is about 1273.7669103522.

The spelling of 2066664065 in words is "two billion, sixty-six million, six hundred sixty-four thousand, sixty-five".