70228661 has 2 divisors, whose sum is σ = 70228662. Its totient is φ = 70228660.

The previous prime is 70228619. The next prime is 70228667. The reversal of 70228661 is 16682207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 16851025 = 7306^2 + 4105^2 .

It is a cyclic number.

It is not a de Polignac number, because 70228661 - 2⁶ = 70228597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70228667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35114330 + 35114331.

It is an arithmetic number, because the mean of its divisors is an integer number (35114331).

Almost surely, 2^70228661 is an apocalyptic number.

It is an amenable number.

70228661 is a deficient number, since it is larger than the sum of its proper divisors (1).

70228661 is an equidigital number, since it uses as much as digits as its factorization.

70228661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 70228661 is about 8380.2542324204. The cubic root of 70228661 is about 412.5767932939.

The spelling of 70228661 in words is "seventy million, two hundred twenty-eight thousand, six hundred sixty-one".