133566669 has 6 divisors (see below), whose sum is σ = 192929646. Its totient is φ = 89044440.

The previous prime is 133566659. The next prime is 133566673. The reversal of 133566669 is 966665331.

It can be written as a sum of positive squares in only one way, i.e., 126832644 + 6734025 = 11262^2 + 2595^2 .

It is not a de Polignac number, because 133566669 - 2¹⁵ = 133533901 is a prime.

It is a super-2 number, since 2×133566669² = 35680110135511122, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133566649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7420362 + ... + 7420379.

It is an arithmetic number, because the mean of its divisors is an integer number (32154941).

Almost surely, 2^133566669 is an apocalyptic number.

It is an amenable number.

133566669 is a deficient number, since it is larger than the sum of its proper divisors (59362977).

133566669 is a wasteful number, since it uses less digits than its factorization.

133566669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840747 (or 14840744 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 133566669 is about 11557.1046979769. The cubic root of 133566669 is about 511.1707934595.

The spelling of 133566669 in words is "one hundred thirty-three million, five hundred sixty-six thousand, six hundred sixty-nine".