670625599681 has 2 divisors, whose sum is σ = 670625599682. Its totient is φ = 670625599680.

The previous prime is 670625599643. The next prime is 670625599757. The reversal of 670625599681 is 186995526076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669109276081 + 1516323600 = 817991^2 + 38940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670625599681 is a prime.

It is a super-2 number, since 2×670625599681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (670625596681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335312799840 + 335312799841.

It is an arithmetic number, because the mean of its divisors is an integer number (335312799841).

Almost surely, 2^670625599681 is an apocalyptic number.

It is an amenable number.

670625599681 is a deficient number, since it is larger than the sum of its proper divisors (1).

670625599681 is an equidigital number, since it uses as much as digits as its factorization.

670625599681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48988800, while the sum is 64.

The spelling of 670625599681 in words is "six hundred seventy billion, six hundred twenty-five million, five hundred ninety-nine thousand, six hundred eighty-one".