133648666 has 8 divisors (see below), whose sum is σ = 201423744. Its totient is φ = 66507420.

The previous prime is 133648663. The next prime is 133648673. The reversal of 133648666 is 666846331.

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 (133648663) 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, 157930 + ... + 158773.

It is an arithmetic number, because the mean of its divisors is an integer number (25177968).

Almost surely, 2^133648666 is an apocalyptic number.

133648666 is a deficient number, since it is larger than the sum of its proper divisors (67775078).

133648666 is a wasteful number, since it uses less digits than its factorization.

133648666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316916.

The product of its digits is 373248, while the sum is 43.

The square root of 133648666 is about 11560.6516252329. The cubic root of 133648666 is about 511.2753751830.

The spelling of 133648666 in words is "one hundred thirty-three million, six hundred forty-eight thousand, six hundred sixty-six".