66619683 has 24 divisors (see below), whose sum is σ = 104242320. Its totient is φ = 40754880.

The previous prime is 66619627. The next prime is 66619691. The reversal of 66619683 is 38691666.

66619683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66619683 - 2²⁴ = 49842467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66619603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19353 + ... + 22533.

It is an arithmetic number, because the mean of its divisors is an integer number (4343430).

Almost surely, 2^66619683 is an apocalyptic number.

66619683 is a deficient number, since it is larger than the sum of its proper divisors (37622637).

66619683 is a wasteful number, since it uses less digits than its factorization.

66619683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379 (or 3376 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 66619683 is about 8162.0881519376. The cubic root of 66619683 is about 405.3848559353.

The spelling of 66619683 in words is "sixty-six million, six hundred nineteen thousand, six hundred eighty-three".