667256652827 has 2 divisors, whose sum is σ = 667256652828. Its totient is φ = 667256652826.

The previous prime is 667256652761. The next prime is 667256652847. The reversal of 667256652827 is 728256652766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667256652827 - 2²⁰ = 667255604251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667256652827.

It is not a weakly prime, because it can be changed into another prime (667256652847) 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, 333628326413 + 333628326414.

It is an arithmetic number, because the mean of its divisors is an integer number (333628326414).

Almost surely, 2^667256652827 is an apocalyptic number.

667256652827 is a deficient number, since it is larger than the sum of its proper divisors (1).

667256652827 is an equidigital number, since it uses as much as digits as its factorization.

667256652827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101606400, while the sum is 62.

The spelling of 667256652827 in words is "six hundred sixty-seven billion, two hundred fifty-six million, six hundred fifty-two thousand, eight hundred twenty-seven".