766291 has 4 divisors (see below), whose sum is σ = 799632. Its totient is φ = 732952.

The previous prime is 766277. The next prime is 766301. The reversal of 766291 is 192667.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 766291 - 2⁷ = 766163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16636 + ... + 16681.

It is an arithmetic number, because the mean of its divisors is an integer number (199908).

2⁷⁶⁶²⁹¹ is an apocalyptic number.

766291 is a deficient number, since it is larger than the sum of its proper divisors (33341).

766291 is a wasteful number, since it uses less digits than its factorization.

766291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33340.

The product of its digits is 4536, while the sum is 31.

The square root of 766291 is about 875.3804887019. The cubic root of 766291 is about 91.5091612952.

The spelling of 766291 in words is "seven hundred sixty-six thousand, two hundred ninety-one".