133565660 has 24 divisors (see below), whose sum is σ = 280714896. Its totient is φ = 53383040.

The previous prime is 133565633. The next prime is 133565689. The reversal of 133565660 is 66565331.

It is a self number, because there is not a number n which added to its sum of digits gives 133565660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36515 + ... + 40005.

It is an arithmetic number, because the mean of its divisors is an integer number (11696454).

Almost surely, 2^133565660 is an apocalyptic number.

133565660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133565660 is an abundant number, since it is smaller than the sum of its proper divisors (147149236).

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

133565660 is a wasteful number, since it uses less digits than its factorization.

133565660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413 (or 5411 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 133565660 is about 11557.0610450927. The cubic root of 133565660 is about 511.1695062805.

The spelling of 133565660 in words is "one hundred thirty-three million, five hundred sixty-five thousand, six hundred sixty".