666289683 has 12 divisors (see below), whose sum is σ = 963590160. Its totient is φ = 443652336.

The previous prime is 666289667. The next prime is 666289699. The reversal of 666289683 is 386982666.

It is an interprime number because it is at equal distance from previous prime (666289667) and next prime (666289699).

It is not a de Polignac number, because 666289683 - 2⁴ = 666289667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666288683) 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, 37191 + ... + 52112.

It is an arithmetic number, because the mean of its divisors is an integer number (80299180).

Almost surely, 2^666289683 is an apocalyptic number.

666289683 is a deficient number, since it is larger than the sum of its proper divisors (297300477).

666289683 is a wasteful number, since it uses less digits than its factorization.

666289683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90138 (or 90135 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 666289683 is about 25812.5876850811. The cubic root of 666289683 is about 873.4157709056.

The spelling of 666289683 in words is "six hundred sixty-six million, two hundred eighty-nine thousand, six hundred eighty-three".