6638525066 has 8 divisors (see below), whose sum is σ = 10126563840. Its totient is φ = 3263003788.

The previous prime is 6638524993. The next prime is 6638525081. The reversal of 6638525066 is 6605258366.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6638525066.

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 3 ways as a sum of consecutive naturals, for example, 28129226 + ... + 28129461.

It is an arithmetic number, because the mean of its divisors is an integer number (1265820480).

Almost surely, 2^6638525066 is an apocalyptic number.

6638525066 is a deficient number, since it is larger than the sum of its proper divisors (3488038774).

6638525066 is a wasteful number, since it uses less digits than its factorization.

6638525066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56258748.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The square root of 6638525066 is about 81477.1444394071. The cubic root of 6638525066 is about 1879.4200967191.

The spelling of 6638525066 in words is "six billion, six hundred thirty-eight million, five hundred twenty-five thousand, sixty-six".