416661 has 8 divisors (see below), whose sum is σ = 634944. Its totient is φ = 238080.

The previous prime is 416659. The next prime is 416677. The reversal of 416661 is 166614.

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

It is not a de Polignac number, because 416661 - 2¹ = 416659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (416621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9900 + ... + 9941.

It is an arithmetic number, because the mean of its divisors is an integer number (79368).

2⁴¹⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

416661 is a deficient number, since it is larger than the sum of its proper divisors (218283).

416661 is a wasteful number, since it uses less digits than its factorization.

416661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19851.

The product of its digits is 864, while the sum is 24.

The square root of 416661 is about 645.4928349719. The cubic root of 416661 is about 74.6897405127.

Subtracting from 416661 its reverse (166614), we obtain a cube (250047 = 63³).

The spelling of 416661 in words is "four hundred sixteen thousand, six hundred sixty-one".