427812666 has 8 divisors (see below), whose sum is σ = 855625344. Its totient is φ = 142604220.

The previous prime is 427812653. The next prime is 427812691. The reversal of 427812666 is 666218724.

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

427812666 is an admirable number.

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, 35651050 + ... + 35651061.

It is an arithmetic number, because the mean of its divisors is an integer number (106953168).

Almost surely, 2^427812666 is an apocalyptic number.

427812666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

427812666 is a wasteful number, since it uses less digits than its factorization.

427812666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71302116.

The product of its digits is 193536, while the sum is 42.

The square root of 427812666 is about 20683.6328047082. The cubic root of 427812666 is about 753.5022372121.

The spelling of 427812666 in words is "four hundred twenty-seven million, eight hundred twelve thousand, six hundred sixty-six".