666605675 has 12 divisors (see below), whose sum is σ = 846753096. Its totient is φ = 520276800.

The previous prime is 666605609. The next prime is 666605677. The reversal of 666605675 is 576506666.

It is not a de Polignac number, because 666605675 - 2¹⁶ = 666540139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666605677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324149 + ... + 326198.

It is an arithmetic number, because the mean of its divisors is an integer number (70562758).

Almost surely, 2^666605675 is an apocalyptic number.

666605675 is a deficient number, since it is larger than the sum of its proper divisors (180147421).

666605675 is a wasteful number, since it uses less digits than its factorization.

666605675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650398 (or 650393 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 47.

The square root of 666605675 is about 25818.7078491547. The cubic root of 666605675 is about 873.5538233596.

Subtracting from 666605675 its reverse (576506666), we obtain a palindrome (90099009).

The spelling of 666605675 in words is "six hundred sixty-six million, six hundred five thousand, six hundred seventy-five".