133166625 has 16 divisors (see below), whose sum is σ = 221589888. Its totient is φ = 71022000.

The previous prime is 133166623. The next prime is 133166639. The reversal of 133166625 is 526661331.

It is not a de Polignac number, because 133166625 - 2¹ = 133166623 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133166623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177181 + ... + 177930.

It is an arithmetic number, because the mean of its divisors is an integer number (13849368).

Almost surely, 2^133166625 is an apocalyptic number.

133166625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133166625 is a deficient number, since it is larger than the sum of its proper divisors (88423263).

133166625 is an equidigital number, since it uses as much as digits as its factorization.

133166625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355129 (or 355119 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 133166625 is about 11539.7844433941. The cubic root of 133166625 is about 510.6599491826.

The spelling of 133166625 in words is "one hundred thirty-three million, one hundred sixty-six thousand, six hundred twenty-five".