766381161 has 32 divisors (see below), whose sum is σ = 1264757760. Its totient is φ = 401961024.

The previous prime is 766381157. The next prime is 766381193. The reversal of 766381161 is 161183667.

766381161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 766381161 - 2² = 766381157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (766381261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41026 + ... + 56708.

It is an arithmetic number, because the mean of its divisors is an integer number (39523680).

Almost surely, 2^766381161 is an apocalyptic number.

It is an amenable number.

766381161 is a deficient number, since it is larger than the sum of its proper divisors (498376599).

766381161 is a wasteful number, since it uses less digits than its factorization.

766381161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15885.

The product of its digits is 36288, while the sum is 39.

The square root of 766381161 is about 27683.5901031640. The cubic root of 766381161 is about 915.1275011193.

The spelling of 766381161 in words is "seven hundred sixty-six million, three hundred eighty-one thousand, one hundred sixty-one".