667616570249 has 2 divisors, whose sum is σ = 667616570250. Its totient is φ = 667616570248.

The previous prime is 667616570227. The next prime is 667616570281. The reversal of 667616570249 is 942075616766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346530014224 + 321086556025 = 588668^2 + 566645^2 .

It is a cyclic number.

It is not a de Polignac number, because 667616570249 - 2²⁴ = 667599793033 is a prime.

It is not a weakly prime, because it can be changed into another prime (667616570209) 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, 333808285124 + 333808285125.

It is an arithmetic number, because the mean of its divisors is an integer number (333808285125).

Almost surely, 2^667616570249 is an apocalyptic number.

It is an amenable number.

667616570249 is a deficient number, since it is larger than the sum of its proper divisors (1).

667616570249 is an equidigital number, since it uses as much as digits as its factorization.

667616570249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 667616570249 in words is "six hundred sixty-seven billion, six hundred sixteen million, five hundred seventy thousand, two hundred forty-nine".