766881 has 8 divisors (see below), whose sum is σ = 1136160. Its totient is φ = 511236.

The previous prime is 766877. The next prime is 766891. The reversal of 766881 is 188667.

It is not a de Polignac number, because 766881 - 2² = 766877 is a prime.

It is a super-2 number, since 2×766881² = 1176212936322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (766811) 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 7 ways as a sum of consecutive naturals, for example, 14175 + ... + 14228.

It is an arithmetic number, because the mean of its divisors is an integer number (142020).

2⁷⁶⁶⁸⁸¹ is an apocalyptic number.

It is an amenable number.

766881 is a deficient number, since it is larger than the sum of its proper divisors (369279).

766881 is a wasteful number, since it uses less digits than its factorization.

766881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28412 (or 28406 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 766881 is about 875.7174201762. The cubic root of 766881 is about 91.5326408674.

The spelling of 766881 in words is "seven hundred sixty-six thousand, eight hundred eighty-one".