66213796 has 12 divisors (see below), whose sum is σ = 126408240. Its totient is φ = 30097160.

The previous prime is 66213781. The next prime is 66213809. The reversal of 66213796 is 69731266.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752386 + ... + 752473.

It is an arithmetic number, because the mean of its divisors is an integer number (10534020).

Almost surely, 2^66213796 is an apocalyptic number.

It is an amenable number.

66213796 is a deficient number, since it is larger than the sum of its proper divisors (60194444).

66213796 is a wasteful number, since it uses less digits than its factorization.

66213796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504874 (or 1504872 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 66213796 is about 8137.1860000863. The cubic root of 66213796 is about 404.5598958490.

The spelling of 66213796 in words is "sixty-six million, two hundred thirteen thousand, seven hundred ninety-six".