767661841 has 2 divisors, whose sum is σ = 767661842. Its totient is φ = 767661840.

The previous prime is 767661793. The next prime is 767661863. The reversal of 767661841 is 148166767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409657600 + 358004241 = 20240^2 + 18921^2 .

It is a cyclic number.

It is not a de Polignac number, because 767661841 - 2⁹ = 767661329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 767661791 and 767661800.

It is not a weakly prime, because it can be changed into another prime (767661341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383830920 + 383830921.

It is an arithmetic number, because the mean of its divisors is an integer number (383830921).

Almost surely, 2^767661841 is an apocalyptic number.

It is an amenable number.

767661841 is a deficient number, since it is larger than the sum of its proper divisors (1).

767661841 is an equidigital number, since it uses as much as digits as its factorization.

767661841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 767661841 is about 27706.7111184276. The cubic root of 767661841 is about 915.6369661775.

The spelling of 767661841 in words is "seven hundred sixty-seven million, six hundred sixty-one thousand, eight hundred forty-one".