166537523 has 2 divisors, whose sum is σ = 166537524. Its totient is φ = 166537522.

The previous prime is 166537499. The next prime is 166537537. The reversal of 166537523 is 325735661.

It is a strong prime.

It is an emirp because it is prime and its reverse (325735661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166537523 - 2¹² = 166533427 is a prime.

It is not a weakly prime, because it can be changed into another prime (166537583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83268761 + 83268762.

It is an arithmetic number, because the mean of its divisors is an integer number (83268762).

Almost surely, 2^166537523 is an apocalyptic number.

166537523 is a deficient number, since it is larger than the sum of its proper divisors (1).

166537523 is an equidigital number, since it uses as much as digits as its factorization.

166537523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 38.

The square root of 166537523 is about 12904.9418053705. The cubic root of 166537523 is about 550.1790304227.

The spelling of 166537523 in words is "one hundred sixty-six million, five hundred thirty-seven thousand, five hundred twenty-three".