3970666517 has 2 divisors, whose sum is σ = 3970666518. Its totient is φ = 3970666516.

The previous prime is 3970666499. The next prime is 3970666529. The reversal of 3970666517 is 7156660793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3468503236 + 502163281 = 58894^2 + 22409^2 .

It is a cyclic number.

It is not a de Polignac number, because 3970666517 - 2²⁶ = 3903557653 is a prime.

It is a super-2 number, since 2×3970666517² = 31532385178449822578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3970666577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985333258 + 1985333259.

It is an arithmetic number, because the mean of its divisors is an integer number (1985333259).

Almost surely, 2^3970666517 is an apocalyptic number.

It is an amenable number.

3970666517 is a deficient number, since it is larger than the sum of its proper divisors (1).

3970666517 is an equidigital number, since it uses as much as digits as its factorization.

3970666517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The square root of 3970666517 is about 63013.2249373098. The cubic root of 3970666517 is about 1583.5111943452.

The spelling of 3970666517 in words is "three billion, nine hundred seventy million, six hundred sixty-six thousand, five hundred seventeen".