667648554259 has 2 divisors, whose sum is σ = 667648554260. Its totient is φ = 667648554258.

The previous prime is 667648554257. The next prime is 667648554263. The reversal of 667648554259 is 952455846766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667648554259 - 2¹ = 667648554257 is a prime.

Together with 667648554257, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 667648554194 and 667648554203.

It is not a weakly prime, because it can be changed into another prime (667648554257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333824277129 + 333824277130.

It is an arithmetic number, because the mean of its divisors is an integer number (333824277130).

Almost surely, 2^667648554259 is an apocalyptic number.

667648554259 is a deficient number, since it is larger than the sum of its proper divisors (1).

667648554259 is an equidigital number, since it uses as much as digits as its factorization.

667648554259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456000, while the sum is 67.

The spelling of 667648554259 in words is "six hundred sixty-seven billion, six hundred forty-eight million, five hundred fifty-four thousand, two hundred fifty-nine".