666794225005 has 8 divisors (see below), whose sum is σ = 842266389600. Its totient is φ = 505359833616.

The previous prime is 666794224979. The next prime is 666794225063. The reversal of 666794225005 is 500522497666.

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 666794225005 - 2⁹ = 666794224493 is a prime.

It is a super-2 number, since 2×666794225005² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3509443195 + ... + 3509443384.

It is an arithmetic number, because the mean of its divisors is an integer number (105283298700).

Almost surely, 2^666794225005 is an apocalyptic number.

It is an amenable number.

666794225005 is a deficient number, since it is larger than the sum of its proper divisors (175472164595).

666794225005 is a wasteful number, since it uses less digits than its factorization.

666794225005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018886603.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 666794225005 in words is "six hundred sixty-six billion, seven hundred ninety-four million, two hundred twenty-five thousand, five".