133766540 has 36 divisors (see below), whose sum is σ = 298418736. Its totient is φ = 50356992.

The previous prime is 133766539. The next prime is 133766543. The reversal of 133766540 is 45667331.

It is a self number, because there is not a number n which added to its sum of digits gives 133766540.

It is not an unprimeable number, because it can be changed into a prime (133766543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5792 + ... + 17351.

Almost surely, 2^133766540 is an apocalyptic number.

133766540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133766540 is an abundant number, since it is smaller than the sum of its proper divisors (164652196).

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

133766540 is a wasteful number, since it uses less digits than its factorization.

133766540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23186 (or 23167 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 133766540 is about 11565.7485706719. The cubic root of 133766540 is about 511.4256407173.

The spelling of 133766540 in words is "one hundred thirty-three million, seven hundred sixty-six thousand, five hundred forty".