166533425 has 6 divisors (see below), whose sum is σ = 206501478. Its totient is φ = 133226720.

The previous prime is 166533421. The next prime is 166533427. The reversal of 166533425 is 524335661.

166533425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 17986081 + 148547344 = 4241^2 + 12188^2 .

It is not a de Polignac number, because 166533425 - 2² = 166533421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166533421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3330644 + ... + 3330693.

It is an arithmetic number, because the mean of its divisors is an integer number (34416913).

Almost surely, 2^166533425 is an apocalyptic number.

It is an amenable number.

166533425 is a deficient number, since it is larger than the sum of its proper divisors (39968053).

166533425 is an equidigital number, since it uses as much as digits as its factorization.

166533425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661347 (or 6661342 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 166533425 is about 12904.7830280094. The cubic root of 166533425 is about 550.1745176216.

The spelling of 166533425 in words is "one hundred sixty-six million, five hundred thirty-three thousand, four hundred twenty-five".