166681150403 has 2 divisors, whose sum is σ = 166681150404. Its totient is φ = 166681150402.

The previous prime is 166681150379. The next prime is 166681150429. The reversal of 166681150403 is 304051186661.

It is a weak prime.

It is an emirp because it is prime and its reverse (304051186661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166681150403 - 2¹⁰ = 166681149379 is a prime.

It is not a weakly prime, because it can be changed into another prime (166681152403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83340575201 + 83340575202.

It is an arithmetic number, because the mean of its divisors is an integer number (83340575202).

Almost surely, 2^166681150403 is an apocalyptic number.

166681150403 is a deficient number, since it is larger than the sum of its proper divisors (1).

166681150403 is an equidigital number, since it uses as much as digits as its factorization.

166681150403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 166681150403 in words is "one hundred sixty-six billion, six hundred eighty-one million, one hundred fifty thousand, four hundred three".