766501 has 2 divisors, whose sum is σ = 766502. Its totient is φ = 766500.

The previous prime is 766487. The next prime is 766511. The reversal of 766501 is 105667.

766501 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 can be written as a sum of positive squares in only one way, i.e., 564001 + 202500 = 751^2 + 450^2 .

It is an emirp because it is prime and its reverse (105667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766501 - 2⁷ = 766373 is a prime.

It is the 876-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766511) by changing a digit.

It is a nontrivial repunit in base 875.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383250 + 383251.

It is an arithmetic number, because the mean of its divisors is an integer number (383251).

2⁷⁶⁶⁵⁰¹ is an apocalyptic number.

It is an amenable number.

766501 is a deficient number, since it is larger than the sum of its proper divisors (1).

766501 is an equidigital number, since it uses as much as digits as its factorization.

766501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 766501 is about 875.5004283266. The cubic root of 766501 is about 91.5175198120.

The spelling of 766501 in words is "seven hundred sixty-six thousand, five hundred one".