2646660445 has 16 divisors (see below), whose sum is σ = 3731236992. Its totient is φ = 1776778560.

The previous prime is 2646660407. The next prime is 2646660463. The reversal of 2646660445 is 5440666462.

It is not a de Polignac number, because 2646660445 - 2¹¹ = 2646658397 is a prime.

It is a super-2 number, since 2×2646660445² = 14009623022255196050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 1850097 + ... + 1851526.

It is an arithmetic number, because the mean of its divisors is an integer number (233202312).

Almost surely, 2^2646660445 is an apocalyptic number.

It is an amenable number.

2646660445 is a deficient number, since it is larger than the sum of its proper divisors (1084576547).

2646660445 is a wasteful number, since it uses less digits than its factorization.

2646660445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701652.

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

The square root of 2646660445 is about 51445.7038536747. The cubic root of 2646660445 is about 1383.2459551267.

The spelling of 2646660445 in words is "two billion, six hundred forty-six million, six hundred sixty thousand, four hundred forty-five".