66120383 has 8 divisors (see below), whose sum is σ = 76631040. Its totient is φ = 55875960.

The previous prime is 66120371. The next prime is 66120419. The reversal of 66120383 is 38302166.

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

It is not a de Polignac number, because 66120383 - 2⁴ = 66120367 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 (66120583) 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, 66023 + ... + 67016.

It is an arithmetic number, because the mean of its divisors is an integer number (9578880).

Almost surely, 2^66120383 is an apocalyptic number.

66120383 is a deficient number, since it is larger than the sum of its proper divisors (10510657).

66120383 is a wasteful number, since it uses less digits than its factorization.

66120383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133117.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 66120383 is about 8131.4440906889. Note that the first 3 decimals coincide. The cubic root of 66120383 is about 404.3695581780.

The spelling of 66120383 in words is "sixty-six million, one hundred twenty thousand, three hundred eighty-three".