166532525466442 has 4 divisors (see below), whose sum is σ = 249798788199666. Its totient is φ = 83266262733220.

The previous prime is 166532525466421. The next prime is 166532525466449. The reversal of 166532525466442 is 244664525235661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 114448894290241 + 52083631176201 = 10698079^2 + 7216899^2 .

It is not an unprimeable number, because it can be changed into a prime (166532525466449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41633131366609 + ... + 41633131366612.

Almost surely, 2^{166532525466442} is an apocalyptic number.

166532525466442 is a deficient number, since it is larger than the sum of its proper divisors (83266262733224).

166532525466442 is an equidigital number, since it uses as much as digits as its factorization.

166532525466442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83266262733223.

The product of its digits is 248832000, while the sum is 61.

The spelling of 166532525466442 in words is "one hundred sixty-six trillion, five hundred thirty-two billion, five hundred twenty-five million, four hundred sixty-six thousand, four hundred forty-two".