133740660 has 48 divisors (see below), whose sum is σ = 374976000. Its totient is φ = 35616384.

The previous prime is 133740619. The next prime is 133740667. The reversal of 133740660 is 66047331.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133740667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85566 + ... + 87114.

It is an arithmetic number, because the mean of its divisors is an integer number (7812000).

Almost surely, 2^133740660 is an apocalyptic number.

133740660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133740660 is an abundant number, since it is smaller than the sum of its proper divisors (241235340).

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

133740660 is a wasteful number, since it uses less digits than its factorization.

133740660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000 (or 2998 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 133740660 is about 11564.6296957577. The cubic root of 133740660 is about 511.3926565115.

Adding to 133740660 its reverse (66047331), we get a palindrome (199787991).

The spelling of 133740660 in words is "one hundred thirty-three million, seven hundred forty thousand, six hundred sixty".