201066049991 has 2 divisors, whose sum is σ = 201066049992. Its totient is φ = 201066049990.

The previous prime is 201066049969. The next prime is 201066049999. The reversal of 201066049991 is 199940660102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201066049991 - 2¹⁴ = 201066033607 is a prime.

It is a super-2 number, since 2×201066049991² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201066049999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100533024995 + 100533024996.

It is an arithmetic number, because the mean of its divisors is an integer number (100533024996).

Almost surely, 2^201066049991 is an apocalyptic number.

201066049991 is a deficient number, since it is larger than the sum of its proper divisors (1).

201066049991 is an equidigital number, since it uses as much as digits as its factorization.

201066049991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 201066049991 in words is "two hundred one billion, sixty-six million, forty-nine thousand, nine hundred ninety-one".