666486444666 has 32 divisors (see below), whose sum is σ = 1528203288960. Its totient is φ = 189823985856.

The previous prime is 666486444649. The next prime is 666486444683. The reversal of 666486444666 is 666444684666.

It is an interprime number because it is at equal distance from previous prime (666486444649) and next prime (666486444683).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666486444597 and 666486444606.

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 15 ways as a sum of consecutive naturals, for example, 25016221 + ... + 25042848.

It is an arithmetic number, because the mean of its divisors is an integer number (47756352780).

Almost surely, 2^666486444666 is an apocalyptic number.

666486444666 is an abundant number, since it is smaller than the sum of its proper divisors (861716844294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666486444666 is a wasteful number, since it uses less digits than its factorization.

666486444666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50059398.

The product of its digits is 573308928, while the sum is 66.

The spelling of 666486444666 in words is "six hundred sixty-six billion, four hundred eighty-six million, four hundred forty-four thousand, six hundred sixty-six".