6657887566 has 8 divisors (see below), whose sum is σ = 10894725144. Its totient is φ = 3026312520.

The previous prime is 6657887563. The next prime is 6657887617.

6657887566 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 6657887498 and 6657887507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657887563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151315605 + ... + 151315648.

It is an arithmetic number, because the mean of its divisors is an integer number (1361840643).

Almost surely, 2^6657887566 is an apocalyptic number.

6657887566 is a deficient number, since it is larger than the sum of its proper divisors (4236837578).

6657887566 is a wasteful number, since it uses less digits than its factorization.

6657887566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302631266.

The product of its digits is 101606400, while the sum is 64.

The square root of 6657887566 is about 81595.8795895969. The cubic root of 6657887566 is about 1881.2455498532.

The spelling of 6657887566 in words is "six billion, six hundred fifty-seven million, eight hundred eighty-seven thousand, five hundred sixty-six".