133729666 has 8 divisors (see below), whose sum is σ = 229250880. Its totient is φ = 57312708.

The previous prime is 133729663. The next prime is 133729681. The reversal of 133729666 is 666927331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (133729663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4776046 + ... + 4776073.

It is an arithmetic number, because the mean of its divisors is an integer number (28656360).

Almost surely, 2^133729666 is an apocalyptic number.

133729666 is a deficient number, since it is larger than the sum of its proper divisors (95521214).

133729666 is an equidigital number, since it uses as much as digits as its factorization.

133729666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9552128.

The product of its digits is 244944, while the sum is 43.

The square root of 133729666 is about 11564.1543573233. The cubic root of 133729666 is about 511.3786433088.

The spelling of 133729666 in words is "one hundred thirty-three million, seven hundred twenty-nine thousand, six hundred sixty-six".