6600005556506 has 4 divisors (see below), whose sum is σ = 9900008334762. Its totient is φ = 3300002778252.

The previous prime is 6600005556491. The next prime is 6600005556511. The reversal of 6600005556506 is 6056555000066.

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

It can be written as a sum of positive squares in only one way, i.e., 3997620354025 + 2602385202481 = 1999405^2 + 1613191^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1650001389125 + ... + 1650001389128.

Almost surely, 2^{6600005556506} is an apocalyptic number.

6600005556506 is a deficient number, since it is larger than the sum of its proper divisors (3300002778256).

6600005556506 is a wasteful number, since it uses less digits than its factorization.

6600005556506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300002778255.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 6600005556506 in words is "six trillion, six hundred billion, five million, five hundred fifty-six thousand, five hundred six".