70733666681 has 2 divisors, whose sum is σ = 70733666682. Its totient is φ = 70733666680.

The previous prime is 70733666573. The next prime is 70733666693. The reversal of 70733666681 is 18666633707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41178555625 + 29555111056 = 202925^2 + 171916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70733666681 is a prime.

It is a super-2 number, since 2×70733666681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70733666881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35366833340 + 35366833341.

It is an arithmetic number, because the mean of its divisors is an integer number (35366833341).

Almost surely, 2^70733666681 is an apocalyptic number.

It is an amenable number.

70733666681 is a deficient number, since it is larger than the sum of its proper divisors (1).

70733666681 is an equidigital number, since it uses as much as digits as its factorization.

70733666681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 53.

The spelling of 70733666681 in words is "seventy billion, seven hundred thirty-three million, six hundred sixty-six thousand, six hundred eighty-one".