666484042666 has 8 divisors (see below), whose sum is σ = 1076628068964. Its totient is φ = 307608019680.

The previous prime is 666484042663. The next prime is 666484042669. The reversal of 666484042666 is 666240484666.

It is an interprime number because it is at equal distance from previous prime (666484042663) and next prime (666484042669).

It can be written as a sum of positive squares in 2 ways, for example, as 513270512041 + 153213530625 = 716429^2 + 391425^2 .

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 666484042666.

It is not an unprimeable number, because it can be changed into a prime (666484042663) 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, 12817000795 + ... + 12817000846.

Almost surely, 2^666484042666 is an apocalyptic number.

666484042666 is a deficient number, since it is larger than the sum of its proper divisors (410144026298).

666484042666 is a wasteful number, since it uses less digits than its factorization.

666484042666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25634001656.

The product of its (nonzero) digits is 47775744, while the sum is 58.

The spelling of 666484042666 in words is "six hundred sixty-six billion, four hundred eighty-four million, forty-two thousand, six hundred sixty-six".