2664570638 has 4 divisors (see below), whose sum is σ = 3996855960. Its totient is φ = 1332285318.

The previous prime is 2664570611. The next prime is 2664570641. The reversal of 2664570638 is 8360754662.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2664570592 and 2664570601.

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 as a sum of consecutive naturals, namely, 666142658 + ... + 666142661.

It is an arithmetic number, because the mean of its divisors is an integer number (999213990).

Almost surely, 2^2664570638 is an apocalyptic number.

2664570638 is a deficient number, since it is larger than the sum of its proper divisors (1332285322).

2664570638 is a wasteful number, since it uses less digits than its factorization.

2664570638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332285321.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The square root of 2664570638 is about 51619.4792496011. The cubic root of 2664570638 is about 1386.3591271900.

The spelling of 2664570638 in words is "two billion, six hundred sixty-four million, five hundred seventy thousand, six hundred thirty-eight".