666873342208 has 36 divisors (see below), whose sum is σ = 1331203442800. Its totient is φ = 333421208064.

The previous prime is 666873342029. The next prime is 666873342209. The reversal of 666873342208 is 802243378666.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (666873342209) 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, 7146991 + ... + 7239697.

Almost surely, 2^666873342208 is an apocalyptic number.

It is an amenable number.

666873342208 is a deficient number, since it is larger than the sum of its proper divisors (664330100592).

666873342208 is an equidigital number, since it uses as much as digits as its factorization.

666873342208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120822 (or 120808 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 55.

The spelling of 666873342208 in words is "six hundred sixty-six billion, eight hundred seventy-three million, three hundred forty-two thousand, two hundred eight".