133666974 has 96 divisors (see below), whose sum is σ = 346057920. Its totient is φ = 36481536.

The previous prime is 133666913. The next prime is 133666979. The reversal of 133666974 is 479666331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133666979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 573562 + ... + 573794.

It is an arithmetic number, because the mean of its divisors is an integer number (3604770).

Almost surely, 2^133666974 is an apocalyptic number.

133666974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133666974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173028960).

133666974 is an abundant number, since it is smaller than the sum of its proper divisors (212390946).

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

133666974 is a wasteful number, since it uses less digits than its factorization.

133666974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 431 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 133666974 is about 11561.4434219954. The cubic root of 133666974 is about 511.2987199781.

The spelling of 133666974 in words is "one hundred thirty-three million, six hundred sixty-six thousand, nine hundred seventy-four".