666812455307 has 8 divisors (see below), whose sum is σ = 669755273040. Its totient is φ = 663869907360.

The previous prime is 666812455291. The next prime is 666812455313. The reversal of 666812455307 is 703554218666.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 666812455307 - 2⁴ = 666812455291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666812455327) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6143168 + ... + 6250770.

It is an arithmetic number, because the mean of its divisors is an integer number (83719409130).

Almost surely, 2^666812455307 is an apocalyptic number.

666812455307 is a deficient number, since it is larger than the sum of its proper divisors (2942817733).

666812455307 is a wasteful number, since it uses less digits than its factorization.

666812455307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134893.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 666812455307 in words is "six hundred sixty-six billion, eight hundred twelve million, four hundred fifty-five thousand, three hundred seven".