427506666 has 32 divisors (see below), whose sum is σ = 870741888. Its totient is φ = 139890240.

The previous prime is 427506659. The next prime is 427506697. The reversal of 427506666 is 666605724.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276291 + ... + 277833.

It is an arithmetic number, because the mean of its divisors is an integer number (27210684).

Almost surely, 2^427506666 is an apocalyptic number.

427506666 is an abundant number, since it is smaller than the sum of its proper divisors (443235222).

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

427506666 is a wasteful number, since it uses less digits than its factorization.

427506666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 427506666 is about 20676.2343283297. The cubic root of 427506666 is about 753.3225427662.

The spelling of 427506666 in words is "four hundred twenty-seven million, five hundred six thousand, six hundred sixty-six".