423217807666 has 8 divisors (see below), whose sum is σ = 635080345344. Its totient is φ = 211524359220.

The previous prime is 423217807627. The next prime is 423217807717. The reversal of 423217807666 is 666708712324.

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

It is a super-2 number, since 2×423217807666² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42266050 + ... + 42276061.

It is an arithmetic number, because the mean of its divisors is an integer number (79385043168).

Almost surely, 2^423217807666 is an apocalyptic number.

423217807666 is a deficient number, since it is larger than the sum of its proper divisors (211862537678).

423217807666 is a wasteful number, since it uses less digits than its factorization.

423217807666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84544616.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 423217807666 in words is "four hundred twenty-three billion, two hundred seventeen million, eight hundred seven thousand, six hundred sixty-six".