70065515055721 has 2 divisors, whose sum is σ = 70065515055722. Its totient is φ = 70065515055720.

The previous prime is 70065515055703. The next prime is 70065515055743. The reversal of 70065515055721 is 12755051556007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48528444007696 + 21537071048025 = 6966236^2 + 4640805^2 .

It is a cyclic number.

It is not a de Polignac number, because 70065515055721 - 2⁵ = 70065515055689 is a prime.

It is a super-2 number, since 2×70065515055721² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70065515056721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35032757527860 + 35032757527861.

It is an arithmetic number, because the mean of its divisors is an integer number (35032757527861).

Almost surely, 2^{70065515055721} is an apocalyptic number.

It is an amenable number.

70065515055721 is a deficient number, since it is larger than the sum of its proper divisors (1).

70065515055721 is an equidigital number, since it uses as much as digits as its factorization.

70065515055721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837500, while the sum is 49.

The spelling of 70065515055721 in words is "seventy trillion, sixty-five billion, five hundred fifteen million, fifty-five thousand, seven hundred twenty-one".