406766 has 4 divisors (see below), whose sum is σ = 610152. Its totient is φ = 203382.

The previous prime is 406739. The next prime is 406789. The reversal of 406766 is 667604.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

406766 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 101690 + ... + 101693.

It is an arithmetic number, because the mean of its divisors is an integer number (152538).

2⁴⁰⁶⁷⁶⁶ is an apocalyptic number.

406766 is a deficient number, since it is larger than the sum of its proper divisors (203386).

406766 is a wasteful number, since it uses less digits than its factorization.

406766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203385.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 406766 is about 637.7820944492. The cubic root of 406766 is about 74.0937453250.

The spelling of 406766 in words is "four hundred six thousand, seven hundred sixty-six".