671115077 has 2 divisors, whose sum is σ = 671115078. Its totient is φ = 671115076.

The previous prime is 671115031. The next prime is 671115079. The reversal of 671115077 is 770511176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341547361 + 329567716 = 18481^2 + 18154^2 .

It is a cyclic number.

It is not a de Polignac number, because 671115077 - 2²⁶ = 604006213 is a prime.

Together with 671115079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671115079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335557538 + 335557539.

It is an arithmetic number, because the mean of its divisors is an integer number (335557539).

Almost surely, 2^671115077 is an apocalyptic number.

It is an amenable number.

671115077 is a deficient number, since it is larger than the sum of its proper divisors (1).

671115077 is an equidigital number, since it uses as much as digits as its factorization.

671115077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10290, while the sum is 35.

The square root of 671115077 is about 25905.8888479048. Note that the first 4 decimals coincide. The cubic root of 671115077 is about 875.5191811891.

The spelling of 671115077 in words is "six hundred seventy-one million, one hundred fifteen thousand, seventy-seven".