66223408 has 10 divisors (see below), whose sum is σ = 128307884. Its totient is φ = 33111696.

The previous prime is 66223393. The next prime is 66223411. The reversal of 66223408 is 80432266.

It is a self number, because there is not a number n which added to its sum of digits gives 66223408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069466 + ... + 2069497.

Almost surely, 2^66223408 is an apocalyptic number.

It is an amenable number.

66223408 is a deficient number, since it is larger than the sum of its proper divisors (62084476).

66223408 is a wasteful number, since it uses less digits than its factorization.

66223408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138971 (or 4138965 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 66223408 is about 8137.7766005218. The cubic root of 66223408 is about 404.5794710322.

The spelling of 66223408 in words is "sixty-six million, two hundred twenty-three thousand, four hundred eight".