66168233 has 4 divisors (see below), whose sum is σ = 70060500. Its totient is φ = 62275968.

The previous prime is 66168211. The next prime is 66168251. The reversal of 66168233 is 33286166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52823824 + 13344409 = 7268^2 + 3653^2 .

It is a cyclic number.

It is not a de Polignac number, because 66168233 - 2⁸ = 66167977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66168193 and 66168202.

It is not an unprimeable number, because it can be changed into a prime (66168253) 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, 1946108 + ... + 1946141.

It is an arithmetic number, because the mean of its divisors is an integer number (17515125).

Almost surely, 2^66168233 is an apocalyptic number.

It is an amenable number.

66168233 is a deficient number, since it is larger than the sum of its proper divisors (3892267).

66168233 is a wasteful number, since it uses less digits than its factorization.

66168233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892266.

The product of its digits is 31104, while the sum is 35.

The square root of 66168233 is about 8134.3858403693. The cubic root of 66168233 is about 404.4670793802.

The spelling of 66168233 in words is "sixty-six million, one hundred sixty-eight thousand, two hundred thirty-three".