2645402066 has 8 divisors (see below), whose sum is σ = 3968387724. Its totient is φ = 1322606160.

The previous prime is 2645402047. The next prime is 2645402117. The reversal of 2645402066 is 6602045462.

It can be written as a sum of positive squares in 2 ways, for example, as 2021851225 + 623550841 = 44965^2 + 24971^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 4985 + ... + 72908.

Almost surely, 2^2645402066 is an apocalyptic number.

2645402066 is a deficient number, since it is larger than the sum of its proper divisors (1322985658).

2645402066 is a wasteful number, since it uses less digits than its factorization.

2645402066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94876.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 2645402066 is about 51433.4722335562. The cubic root of 2645402066 is about 1383.0266947115.

The spelling of 2645402066 in words is "two billion, six hundred forty-five million, four hundred two thousand, sixty-six".