133686680 has 16 divisors (see below), whose sum is σ = 300795120. Its totient is φ = 53474656.

The previous prime is 133686643. The next prime is 133686697. The reversal of 133686680 is 86686331.

It is a super-4 number, since 4×133686680⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671044 + ... + 1671123.

It is an arithmetic number, because the mean of its divisors is an integer number (18799695).

Almost surely, 2^133686680 is an apocalyptic number.

133686680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133686680 is an abundant number, since it is smaller than the sum of its proper divisors (167108440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133686680 is a wasteful number, since it uses less digits than its factorization.

133686680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342178 (or 3342174 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 133686680 is about 11562.2956198153. The cubic root of 133686680 is about 511.3238450013.

The spelling of 133686680 in words is "one hundred thirty-three million, six hundred eighty-six thousand, six hundred eighty".