166202440545187 has 2 divisors, whose sum is σ = 166202440545188. Its totient is φ = 166202440545186.

The previous prime is 166202440545139. The next prime is 166202440545227. The reversal of 166202440545187 is 781545044202661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166202440545187 is a prime.

It is not a weakly prime, because it can be changed into another prime (166202440545137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83101220272593 + 83101220272594.

It is an arithmetic number, because the mean of its divisors is an integer number (83101220272594).

Almost surely, 2^{166202440545187} is an apocalyptic number.

166202440545187 is a deficient number, since it is larger than the sum of its proper divisors (1).

166202440545187 is an equidigital number, since it uses as much as digits as its factorization.

166202440545187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 166202440545187 in words is "one hundred sixty-six trillion, two hundred two billion, four hundred forty million, five hundred forty-five thousand, one hundred eighty-seven".