133166025 has 30 divisors (see below), whose sum is σ = 246673262. Its totient is φ = 71020800.

The previous prime is 133166023. The next prime is 133166039. The reversal of 133166025 is 520661331.

It can be written as a sum of positive squares in 3 ways, for example, as 40602384 + 92563641 = 6372^2 + 9621^2 .

It is not a de Polignac number, because 133166025 - 2¹ = 133166023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133166025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133166023) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 30856 + ... + 34905.

Almost surely, 2^133166025 is an apocalyptic number.

133166025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133166025 is a deficient number, since it is larger than the sum of its proper divisors (113507237).

133166025 is an equidigital number, since it uses as much as digits as its factorization.

133166025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65783 (or 65769 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 133166025 is about 11539.7584463454. The cubic root of 133166025 is about 510.6591822326.

The spelling of 133166025 in words is "one hundred thirty-three million, one hundred sixty-six thousand, twenty-five".