664070070427 has 2 divisors, whose sum is σ = 664070070428. Its totient is φ = 664070070426.

The previous prime is 664070070401. The next prime is 664070070553. The reversal of 664070070427 is 724070070466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664070070427 is a prime.

It is not a weakly prime, because it can be changed into another prime (664070970427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332035035213 + 332035035214.

It is an arithmetic number, because the mean of its divisors is an integer number (332035035214).

Almost surely, 2^664070070427 is an apocalyptic number.

664070070427 is a deficient number, since it is larger than the sum of its proper divisors (1).

664070070427 is an equidigital number, since it uses as much as digits as its factorization.

664070070427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 43.

The spelling of 664070070427 in words is "six hundred sixty-four billion, seventy million, seventy thousand, four hundred twenty-seven".