654143334661 has 2 divisors, whose sum is σ = 654143334662. Its totient is φ = 654143334660.

The previous prime is 654143334563. The next prime is 654143334707. The reversal of 654143334661 is 166433341456.

It is an a-pointer prime, because the next prime (654143334707) can be obtained adding 654143334661 to its sum of digits (46).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411754505761 + 242388828900 = 641681^2 + 492330^2 .

It is a cyclic number.

It is not a de Polignac number, because 654143334661 - 2¹¹ = 654143332613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654143334961) 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, 327071667330 + 327071667331.

It is an arithmetic number, because the mean of its divisors is an integer number (327071667331).

Almost surely, 2^654143334661 is an apocalyptic number.

It is an amenable number.

654143334661 is a deficient number, since it is larger than the sum of its proper divisors (1).

654143334661 is an equidigital number, since it uses as much as digits as its factorization.

654143334661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 46.

The spelling of 654143334661 in words is "six hundred fifty-four billion, one hundred forty-three million, three hundred thirty-four thousand, six hundred sixty-one".