427661 has 8 divisors (see below), whose sum is σ = 468384. Its totient is φ = 388080.

The previous prime is 427621. The next prime is 427681. The reversal of 427661 is 166724.

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

It is a cyclic number.

It is not a de Polignac number, because 427661 - 2⁶ = 427597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427661.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 427661.

It is not an unprimeable number, because it can be changed into a prime (427621) 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, 626 + ... + 1116.

It is an arithmetic number, because the mean of its divisors is an integer number (58548).

2⁴²⁷⁶⁶¹ is an apocalyptic number.

It is an amenable number.

427661 is a deficient number, since it is larger than the sum of its proper divisors (40723).

427661 is a wasteful number, since it uses less digits than its factorization.

427661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its digits is 2016, while the sum is 26.

The square root of 427661 is about 653.9579497185. The cubic root of 427661 is about 75.3413184077.

The spelling of 427661 in words is "four hundred twenty-seven thousand, six hundred sixty-one".