766401 has 4 divisors (see below), whose sum is σ = 1021872. Its totient is φ = 510932.

The previous prime is 766399. The next prime is 766421. The reversal of 766401 is 104667.

766401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 766401 - 2¹ = 766399 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (766421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127731 + ... + 127736.

It is an arithmetic number, because the mean of its divisors is an integer number (255468).

2⁷⁶⁶⁴⁰¹ is an apocalyptic number.

It is an amenable number.

766401 is a deficient number, since it is larger than the sum of its proper divisors (255471).

766401 is a wasteful number, since it uses less digits than its factorization.

766401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255470.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 766401 is about 875.4433162690. The cubic root of 766401 is about 91.5135397563.

The spelling of 766401 in words is "seven hundred sixty-six thousand, four hundred one".