70545651751661 has 2 divisors, whose sum is σ = 70545651751662. Its totient is φ = 70545651751660.

The previous prime is 70545651751651. The next prime is 70545651751691. The reversal of 70545651751661 is 16615715654507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69425640162025 + 1120011589636 = 8332205^2 + 1058306^2 .

It is a cyclic number.

It is not a de Polignac number, because 70545651751661 - 2¹⁴ = 70545651735277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70545651751661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70545651751651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35272825875830 + 35272825875831.

It is an arithmetic number, because the mean of its divisors is an integer number (35272825875831).

Almost surely, 2^{70545651751661} is an apocalyptic number.

It is an amenable number.

70545651751661 is a deficient number, since it is larger than the sum of its proper divisors (1).

70545651751661 is an equidigital number, since it uses as much as digits as its factorization.

70545651751661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460000, while the sum is 59.

The spelling of 70545651751661 in words is "seventy trillion, five hundred forty-five billion, six hundred fifty-one million, seven hundred fifty-one thousand, six hundred sixty-one".