766431 has 6 divisors (see below), whose sum is σ = 1107080. Its totient is φ = 510948.

The previous prime is 766421. The next prime is 766439. The reversal of 766431 is 134667.

It is not a de Polignac number, because 766431 - 2⁵ = 766399 is a prime.

It is a super-2 number, since 2×766431² = 1174832955522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 766395 and 766404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42571 + ... + 42588.

2⁷⁶⁶⁴³¹ is an apocalyptic number.

766431 is a deficient number, since it is larger than the sum of its proper divisors (340649).

766431 is a wasteful number, since it uses less digits than its factorization.

766431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85165 (or 85162 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 766431 is about 875.4604502775. The cubic root of 766431 is about 91.5147338094.

The spelling of 766431 in words is "seven hundred sixty-six thousand, four hundred thirty-one".