6966971657 has 2 divisors, whose sum is σ = 6966971658. Its totient is φ = 6966971656.

The previous prime is 6966971621. The next prime is 6966971663. The reversal of 6966971657 is 7561796696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5182416121 + 1784555536 = 71989^2 + 42244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6966971657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6966971657.

It is not a weakly prime, because it can be changed into another prime (6966971677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3483485828 + 3483485829.

It is an arithmetic number, because the mean of its divisors is an integer number (3483485829).

Almost surely, 2^6966971657 is an apocalyptic number.

It is an amenable number.

6966971657 is a deficient number, since it is larger than the sum of its proper divisors (1).

6966971657 is an equidigital number, since it uses as much as digits as its factorization.

6966971657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25719120, while the sum is 62.

The square root of 6966971657 is about 83468.3871714316. The cubic root of 6966971657 is about 1909.9178219077.

The spelling of 6966971657 in words is "six billion, nine hundred sixty-six million, nine hundred seventy-one thousand, six hundred fifty-seven".