2646506664 has 48 divisors (see below), whose sum is σ = 7302870900. Its totient is φ = 865522944.

The previous prime is 2646506657. The next prime is 2646506677. The reversal of 2646506664 is 4666056462.

It can be written as a sum of positive squares in 2 ways, for example, as 2537136900 + 109369764 = 50370^2 + 10458^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342949 + ... + 350580.

Almost surely, 2^2646506664 is an apocalyptic number.

2646506664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2646506664 is an abundant number, since it is smaller than the sum of its proper divisors (4656364236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2646506664 is a wasteful number, since it uses less digits than its factorization.

2646506664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693594 (or 693587 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The square root of 2646506664 is about 51444.2092368033. The cubic root of 2646506664 is about 1383.2191639974.

The spelling of 2646506664 in words is "two billion, six hundred forty-six million, five hundred six thousand, six hundred sixty-four".