427521666686 has 8 divisors (see below), whose sum is σ = 661969032384. Its totient is φ = 206865322560.

The previous prime is 427521666623. The next prime is 427521666703. The reversal of 427521666686 is 686666125724.

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

It is a congruent 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, 3447755315 + ... + 3447755438.

It is an arithmetic number, because the mean of its divisors is an integer number (82746129048).

Almost surely, 2^427521666686 is an apocalyptic number.

427521666686 is a deficient number, since it is larger than the sum of its proper divisors (234447365698).

427521666686 is a wasteful number, since it uses less digits than its factorization.

427521666686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6895510786.

The product of its digits is 34836480, while the sum is 59.

The spelling of 427521666686 in words is "four hundred twenty-seven billion, five hundred twenty-one million, six hundred sixty-six thousand, six hundred eighty-six".