670060656721 has 2 divisors, whose sum is σ = 670060656722. Its totient is φ = 670060656720.

The previous prime is 670060656709. The next prime is 670060656737. The reversal of 670060656721 is 127656060076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631452729600 + 38607927121 = 794640^2 + 196489^2 .

It is a cyclic number.

It is not a de Polignac number, because 670060656721 - 2⁵ = 670060656689 is a prime.

It is not a weakly prime, because it can be changed into another prime (670060456721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335030328360 + 335030328361.

It is an arithmetic number, because the mean of its divisors is an integer number (335030328361).

Almost surely, 2^670060656721 is an apocalyptic number.

It is an amenable number.

670060656721 is a deficient number, since it is larger than the sum of its proper divisors (1).

670060656721 is an equidigital number, since it uses as much as digits as its factorization.

670060656721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 670060656721 in words is "six hundred seventy billion, sixty million, six hundred fifty-six thousand, seven hundred twenty-one".