667212270457 has 2 divisors, whose sum is σ = 667212270458. Its totient is φ = 667212270456.

The previous prime is 667212270433. The next prime is 667212270547. The reversal of 667212270457 is 754072212766.

Together with next prime (667212270547) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 569656619536 + 97555650921 = 754756^2 + 312339^2 .

It is a cyclic number.

It is not a de Polignac number, because 667212270457 - 2²³ = 667203881849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667212270457.

It is not a weakly prime, because it can be changed into another prime (667212270407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333606135228 + 333606135229.

It is an arithmetic number, because the mean of its divisors is an integer number (333606135229).

Almost surely, 2^667212270457 is an apocalyptic number.

It is an amenable number.

667212270457 is a deficient number, since it is larger than the sum of its proper divisors (1).

667212270457 is an equidigital number, since it uses as much as digits as its factorization.

667212270457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 667212270457 in words is "six hundred sixty-seven billion, two hundred twelve million, two hundred seventy thousand, four hundred fifty-seven".