424556666 has 8 divisors (see below), whose sum is σ = 637783284. Its totient is φ = 211962240.

The previous prime is 424556663. The next prime is 424556683. The reversal of 424556666 is 666655424.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 414977641 + 9579025 = 20371^2 + 3095^2 .

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

It is not an unprimeable number, because it can be changed into a prime (424556663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156365 + ... + 159056.

Almost surely, 2^424556666 is an apocalyptic number.

424556666 is a deficient number, since it is larger than the sum of its proper divisors (213226618).

424556666 is a wasteful number, since it uses less digits than its factorization.

424556666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316096.

The product of its digits is 1036800, while the sum is 44.

The square root of 424556666 is about 20604.7728936768. The cubic root of 424556666 is about 751.5857801129.

The spelling of 424556666 in words is "four hundred twenty-four million, five hundred fifty-six thousand, six hundred sixty-six".