66120733 has 8 divisors (see below), whose sum is σ = 76992768. Its totient is φ = 55605264.

The previous prime is 66120727. The next prime is 66120749. The reversal of 66120733 is 33702166.

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 66120733 - 2¹⁷ = 65989661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66120763) 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, 88741 + ... + 89482.

It is an arithmetic number, because the mean of its divisors is an integer number (9624096).

Almost surely, 2^66120733 is an apocalyptic number.

It is an amenable number.

66120733 is a deficient number, since it is larger than the sum of its proper divisors (10872035).

66120733 is a wasteful number, since it uses less digits than its factorization.

66120733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178283.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 66120733 is about 8131.4656120530. The cubic root of 66120733 is about 404.3702716700.

Adding to 66120733 its reverse (33702166), we get a palindrome (99822899).

The spelling of 66120733 in words is "sixty-six million, one hundred twenty thousand, seven hundred thirty-three".