66244666 has 8 divisors (see below), whose sum is σ = 99401940. Its totient is φ = 33110688.

The previous prime is 66244637. The next prime is 66244691. The reversal of 66244666 is 66644266.

It can be written as a sum of positive squares in 2 ways, for example, as 66080641 + 164025 = 8129^2 + 405^2 .

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

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, 6520 + ... + 13228.

Almost surely, 2^66244666 is an apocalyptic number.

66244666 is a deficient number, since it is larger than the sum of its proper divisors (33157274).

66244666 is a wasteful number, since it uses less digits than its factorization.

66244666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11648.

The product of its digits is 248832, while the sum is 40.

The square root of 66244666 is about 8139.0826264389. The cubic root of 66244666 is about 404.6227569867.

The spelling of 66244666 in words is "sixty-six million, two hundred forty-four thousand, six hundred sixty-six".