66280383 has 16 divisors (see below), whose sum is σ = 105747040. Its totient is φ = 40787712.

The previous prime is 66280381. The next prime is 66280421. The reversal of 66280383 is 38308266.

It is not a de Polignac number, because 66280383 - 2¹ = 66280381 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 (66280381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94066 + ... + 94767.

It is an arithmetic number, because the mean of its divisors is an integer number (6609190).

Almost surely, 2^66280383 is an apocalyptic number.

66280383 is a deficient number, since it is larger than the sum of its proper divisors (39466657).

66280383 is a wasteful number, since it uses less digits than its factorization.

66280383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188855 (or 188849 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 66280383 is about 8141.2764969629. The cubic root of 66280383 is about 404.6954637938.

The spelling of 66280383 in words is "sixty-six million, two hundred eighty thousand, three hundred eighty-three".