766427 has 4 divisors (see below), whose sum is σ = 777000. Its totient is φ = 755856.

The previous prime is 766421. The next prime is 766439. The reversal of 766427 is 724667.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724667 = 79 ⋅9173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 766393 and 766402.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5177 + ... + 5322.

It is an arithmetic number, because the mean of its divisors is an integer number (194250).

2⁷⁶⁶⁴²⁷ is an apocalyptic number.

766427 is a deficient number, since it is larger than the sum of its proper divisors (10573).

766427 is a wasteful number, since it uses less digits than its factorization.

766427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10572.

The product of its digits is 14112, while the sum is 32.

The square root of 766427 is about 875.4581657624. The cubic root of 766427 is about 91.5145746041.

The spelling of 766427 in words is "seven hundred sixty-six thousand, four hundred twenty-seven".