423886666 has 16 divisors (see below), whose sum is σ = 735863040. Its totient is φ = 179365680.

The previous prime is 423886663. The next prime is 423886667. The reversal of 423886666 is 666688324.

It is a happy number.

It is a super-2 number, since 2×423886666² = 359359811225191112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423886663) by changing a digit.

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, 190525 + ... + 192736.

It is an arithmetic number, because the mean of its divisors is an integer number (45991440).

Almost surely, 2^423886666 is an apocalyptic number.

423886666 is a deficient number, since it is larger than the sum of its proper divisors (311976374).

423886666 is a wasteful number, since it uses less digits than its factorization.

423886666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383349.

The product of its digits is 1990656, while the sum is 49.

The square root of 423886666 is about 20588.5081052513. The cubic root of 423886666 is about 751.1902085760.

The spelling of 423886666 in words is "four hundred twenty-three million, eight hundred eighty-six thousand, six hundred sixty-six".