766531 has 2 divisors, whose sum is σ = 766532. Its totient is φ = 766530.

The previous prime is 766511. The next prime is 766541. The reversal of 766531 is 135667.

766531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 766531 - 2¹³ = 758339 is a prime.

It is a super-2 number, since 2×766531² = 1175139547922, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 766531.

It is not a weakly prime, because it can be changed into another prime (766501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383265 + 383266.

It is an arithmetic number, because the mean of its divisors is an integer number (383266).

2⁷⁶⁶⁵³¹ is an apocalyptic number.

766531 is a deficient number, since it is larger than the sum of its proper divisors (1).

766531 is an equidigital number, since it uses as much as digits as its factorization.

766531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 766531 is about 875.5175612174. The cubic root of 766531 is about 91.5187137612.

The spelling of 766531 in words is "seven hundred sixty-six thousand, five hundred thirty-one".