664416283848173 has 2 divisors, whose sum is σ = 664416283848174. Its totient is φ = 664416283848172.

The previous prime is 664416283848127. The next prime is 664416283848199. The reversal of 664416283848173 is 371848382614466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607319490685609 + 57096793162564 = 24643853^2 + 7556242^2 .

It is a cyclic number.

It is not a de Polignac number, because 664416283848173 - 2²⁴ = 664416267070957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664416283848097 and 664416283848106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664416283818173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332208141924086 + 332208141924087.

It is an arithmetic number, because the mean of its divisors is an integer number (332208141924087).

Almost surely, 2^{664416283848173} is an apocalyptic number.

It is an amenable number.

664416283848173 is a deficient number, since it is larger than the sum of its proper divisors (1).

664416283848173 is an equidigital number, since it uses as much as digits as its factorization.

664416283848173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 891813888, while the sum is 71.

The spelling of 664416283848173 in words is "six hundred sixty-four trillion, four hundred sixteen billion, two hundred eighty-three million, eight hundred forty-eight thousand, one hundred seventy-three".