666006005606 has 4 divisors (see below), whose sum is σ = 999009008412. Its totient is φ = 333003002802.

The previous prime is 666006005563. The next prime is 666006005617. The reversal of 666006005606 is 606500600666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 606500600666 = 2 ⋅303250300333.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166501501400 + ... + 166501501403.

It is an arithmetic number, because the mean of its divisors is an integer number (249752252103).

Almost surely, 2^666006005606 is an apocalyptic number.

666006005606 is a deficient number, since it is larger than the sum of its proper divisors (333003002806).

666006005606 is a wasteful number, since it uses less digits than its factorization.

666006005606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333003002805.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 666006005606 in words is "six hundred sixty-six billion, six million, five thousand, six hundred six".