133666634 has 8 divisors (see below), whose sum is σ = 211052640. Its totient is φ = 63315756.

The previous prime is 133666609. The next prime is 133666649. The reversal of 133666634 is 436666331.

It is a happy number.

133666634 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 3517543 = 133666634 / (1 + 3 + 3 + 6 + 6 + 6 + 6 + 3 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758734 + ... + 1758809.

It is an arithmetic number, because the mean of its divisors is an integer number (26381580).

Almost surely, 2^133666634 is an apocalyptic number.

133666634 is a deficient number, since it is larger than the sum of its proper divisors (77386006).

133666634 is a wasteful number, since it uses less digits than its factorization.

133666634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517564.

The product of its digits is 139968, while the sum is 38.

The square root of 133666634 is about 11561.4287179397. The cubic root of 133666634 is about 511.2982864586.

The spelling of 133666634 in words is "one hundred thirty-three million, six hundred sixty-six thousand, six hundred thirty-four".