66623133 has 8 divisors (see below), whose sum is σ = 89148096. Its totient is φ = 44256800.

The previous prime is 66623131. The next prime is 66623143. The reversal of 66623133 is 33132666.

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

It is a cyclic number.

It is not a de Polignac number, because 66623133 - 2¹ = 66623131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66623133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66623131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38673 + ... + 40358.

It is an arithmetic number, because the mean of its divisors is an integer number (11143512).

Almost surely, 2^66623133 is an apocalyptic number.

It is an amenable number.

66623133 is a deficient number, since it is larger than the sum of its proper divisors (22524963).

66623133 is a wasteful number, since it uses less digits than its factorization.

66623133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79315.

The product of its digits is 11664, while the sum is 30.

The square root of 66623133 is about 8162.2994921774. The cubic root of 66623133 is about 405.3918536350.

Adding to 66623133 its reverse (33132666), we get a palindrome (99755799).

The spelling of 66623133 in words is "sixty-six million, six hundred twenty-three thousand, one hundred thirty-three".