200166643 has 2 divisors, whose sum is σ = 200166644. Its totient is φ = 200166642.

The previous prime is 200166599. The next prime is 200166667. The reversal of 200166643 is 346661002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200166643 is a prime.

It is not a weakly prime, because it can be changed into another prime (200166683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100083321 + 100083322.

It is an arithmetic number, because the mean of its divisors is an integer number (100083322).

Almost surely, 2^200166643 is an apocalyptic number.

200166643 is a deficient number, since it is larger than the sum of its proper divisors (1).

200166643 is an equidigital number, since it uses as much as digits as its factorization.

200166643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 200166643 is about 14148.0261167415. The cubic root of 200166643 is about 584.9659249152.

It can be divided in two parts, 2001 and 66643, that added together give a square (68644 = 262²).

The spelling of 200166643 in words is "two hundred million, one hundred sixty-six thousand, six hundred forty-three".