666455546 has 8 divisors (see below), whose sum is σ = 1031931264. Its totient is φ = 322478460.

The previous prime is 666455519. The next prime is 666455593. The reversal of 666455546 is 645554666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 666455546.

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 3 ways as a sum of consecutive naturals, for example, 5374580 + ... + 5374703.

It is an arithmetic number, because the mean of its divisors is an integer number (128991408).

Almost surely, 2^666455546 is an apocalyptic number.

666455546 is a deficient number, since it is larger than the sum of its proper divisors (365475718).

666455546 is a wasteful number, since it uses less digits than its factorization.

666455546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10749316.

The product of its digits is 2592000, while the sum is 47.

The square root of 666455546 is about 25815.8003168602. The cubic root of 666455546 is about 873.4882395552.

The spelling of 666455546 in words is "six hundred sixty-six million, four hundred fifty-five thousand, five hundred forty-six".