666224015 has 8 divisors (see below), whose sum is σ = 802787568. Its totient is φ = 530766720.

The previous prime is 666224011. The next prime is 666224017. The reversal of 666224015 is 510422666.

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

It is not a de Polignac number, because 666224015 - 2² = 666224011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666224011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275237 + ... + 277646.

It is an arithmetic number, because the mean of its divisors is an integer number (100348446).

Almost surely, 2^666224015 is an apocalyptic number.

666224015 is a deficient number, since it is larger than the sum of its proper divisors (136563553).

666224015 is a wasteful number, since it uses less digits than its factorization.

666224015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553129.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 666224015 is about 25811.3156386884. The cubic root of 666224015 is about 873.3870760037.

The spelling of 666224015 in words is "six hundred sixty-six million, two hundred twenty-four thousand, fifteen".