70207105606721 has 4 divisors (see below), whose sum is σ = 70252429756500. Its totient is φ = 70161781456944.

The previous prime is 70207105606663. The next prime is 70207105606763. The reversal of 70207105606721 is 12760650170207.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42041413084225 + 28165692522496 = 6483935^2 + 5307136^2 .

It is a cyclic number.

It is not a de Polignac number, because 70207105606721 - 2³⁴ = 70189925737537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70207105606321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22662072566 + ... + 22662075663.

It is an arithmetic number, because the mean of its divisors is an integer number (17563107439125).

Almost surely, 2^{70207105606721} is an apocalyptic number.

It is an amenable number.

70207105606721 is a deficient number, since it is larger than the sum of its proper divisors (45324149779).

70207105606721 is a wasteful number, since it uses less digits than its factorization.

70207105606721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45324149778.

The product of its (nonzero) digits is 246960, while the sum is 44.

Adding to 70207105606721 its reverse (12760650170207), we get a palindrome (82967755776928).

The spelling of 70207105606721 in words is "seventy trillion, two hundred seven billion, one hundred five million, six hundred six thousand, seven hundred twenty-one".