423191666 has 16 divisors (see below), whose sum is σ = 657434880. Its totient is φ = 204173760.

The previous prime is 423191663. The next prime is 423191677. The reversal of 423191666 is 666191324.

It is not an unprimeable number, because it can be changed into a prime (423191663) 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, 25031 + ... + 38378.

It is an arithmetic number, because the mean of its divisors is an integer number (41089680).

Almost surely, 2^423191666 is an apocalyptic number.

423191666 is a deficient number, since it is larger than the sum of its proper divisors (234243214).

423191666 is a wasteful number, since it uses less digits than its factorization.

423191666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63529.

The product of its digits is 46656, while the sum is 38.

The square root of 423191666 is about 20571.6228334082. The cubic root of 423191666 is about 750.7794362102.

The spelling of 423191666 in words is "four hundred twenty-three million, one hundred ninety-one thousand, six hundred sixty-six".