133166985 has 64 divisors (see below), whose sum is σ = 254983680. Its totient is φ = 58060800.

The previous prime is 133166977. The next prime is 133167007. The reversal of 133166985 is 589661331.

It is a happy number.

It is not a de Polignac number, because 133166985 - 2³ = 133166977 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307329 + ... + 307761.

It is an arithmetic number, because the mean of its divisors is an integer number (3984120).

Almost surely, 2^133166985 is an apocalyptic number.

133166985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133166985 is a deficient number, since it is larger than the sum of its proper divisors (121816695).

133166985 is a wasteful number, since it uses less digits than its factorization.

133166985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its digits is 116640, while the sum is 42.

The square root of 133166985 is about 11539.8000415952. The cubic root of 133166985 is about 510.6604093515.

It can be divided in two parts, 13316 and 6985, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 133166985 in words is "one hundred thirty-three million, one hundred sixty-six thousand, nine hundred eighty-five".