666224047 has 16 divisors (see below), whose sum is σ = 718048800. Its totient is φ = 616860160.

The previous prime is 666224021. The next prime is 666224059. The reversal of 666224047 is 740422666.

It is not a de Polignac number, because 666224047 - 2¹¹ = 666221999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666223997 and 666224015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666224017) 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 15 ways as a sum of consecutive naturals, for example, 65403 + ... + 74899.

It is an arithmetic number, because the mean of its divisors is an integer number (44878050).

Almost surely, 2^666224047 is an apocalyptic number.

666224047 is a deficient number, since it is larger than the sum of its proper divisors (51824753).

666224047 is a wasteful number, since it uses less digits than its factorization.

666224047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9626.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 666224047 is about 25811.3162585715. The cubic root of 666224047 is about 873.3870899872.

The spelling of 666224047 in words is "six hundred sixty-six million, two hundred twenty-four thousand, forty-seven".