70763520661 has 2 divisors, whose sum is σ = 70763520662. Its totient is φ = 70763520660.

The previous prime is 70763520643. The next prime is 70763520677. The reversal of 70763520661 is 16602536707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67233378436 + 3530142225 = 259294^2 + 59415^2 .

It is an emirp because it is prime and its reverse (16602536707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70763520661 - 2⁷ = 70763520533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70763520461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35381760330 + 35381760331.

It is an arithmetic number, because the mean of its divisors is an integer number (35381760331).

Almost surely, 2^70763520661 is an apocalyptic number.

It is an amenable number.

70763520661 is a deficient number, since it is larger than the sum of its proper divisors (1).

70763520661 is an equidigital number, since it uses as much as digits as its factorization.

70763520661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 70763520661 in words is "seventy billion, seven hundred sixty-three million, five hundred twenty thousand, six hundred sixty-one".