70767737081 has 2 divisors, whose sum is σ = 70767737082. Its totient is φ = 70767737080.

The previous prime is 70767737077. The next prime is 70767737083. The reversal of 70767737081 is 18073776707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55027776400 + 15739960681 = 234580^2 + 125459^2 .

It is a cyclic number.

It is not a de Polignac number, because 70767737081 - 2² = 70767737077 is a prime.

It is a super-2 number, since 2×70767737081² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 70767737083, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70767737083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35383868540 + 35383868541.

It is an arithmetic number, because the mean of its divisors is an integer number (35383868541).

Almost surely, 2^70767737081 is an apocalyptic number.

It is an amenable number.

70767737081 is a deficient number, since it is larger than the sum of its proper divisors (1).

70767737081 is an equidigital number, since it uses as much as digits as its factorization.

70767737081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2420208, while the sum is 53.

The spelling of 70767737081 in words is "seventy billion, seven hundred sixty-seven million, seven hundred thirty-seven thousand, eighty-one".