766270161 has 24 divisors (see below), whose sum is σ = 1148383080. Its totient is φ = 491774976.

The previous prime is 766270157. The next prime is 766270177. The reversal of 766270161 is 161072667.

It can be written as a sum of positive squares in 4 ways, for example, as 306425025 + 459845136 = 17505^2 + 21444^2 .

It is not a de Polignac number, because 766270161 - 2² = 766270157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766270061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87975 + ... + 96291.

It is an arithmetic number, because the mean of its divisors is an integer number (47849295).

Almost surely, 2^766270161 is an apocalyptic number.

It is an amenable number.

766270161 is a deficient number, since it is larger than the sum of its proper divisors (382112919).

766270161 is a wasteful number, since it uses less digits than its factorization.

766270161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8705 (or 8702 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 766270161 is about 27681.5852327861. The cubic root of 766270161 is about 915.0833176840.

The spelling of 766270161 in words is "seven hundred sixty-six million, two hundred seventy thousand, one hundred sixty-one".