766670161 has 2 divisors, whose sum is σ = 766670162. Its totient is φ = 766670160.

The previous prime is 766670153. The next prime is 766670173. The reversal of 766670161 is 161076667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 738154561 + 28515600 = 27169^2 + 5340^2 .

It is a cyclic number.

It is not a de Polignac number, because 766670161 - 2³ = 766670153 is a prime.

It is not a weakly prime, because it can be changed into another prime (766670461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383335080 + 383335081.

It is an arithmetic number, because the mean of its divisors is an integer number (383335081).

Almost surely, 2^766670161 is an apocalyptic number.

It is an amenable number.

766670161 is a deficient number, since it is larger than the sum of its proper divisors (1).

766670161 is an equidigital number, since it uses as much as digits as its factorization.

766670161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 766670161 is about 27688.8093098999. The cubic root of 766670161 is about 915.2425172602.

The spelling of 766670161 in words is "seven hundred sixty-six million, six hundred seventy thousand, one hundred sixty-one".