66242818 has 8 divisors (see below), whose sum is σ = 99443520. Its totient is φ = 33094980.

The previous prime is 66242809. The next prime is 66242831. The reversal of 66242818 is 81824266.

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

It is a super-2 number, since 2×66242818² = 8776221873162248, which contains 22 as substring.

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, 9918 + ... + 15193.

It is an arithmetic number, because the mean of its divisors is an integer number (12430440).

Almost surely, 2^66242818 is an apocalyptic number.

66242818 is a deficient number, since it is larger than the sum of its proper divisors (33200702).

66242818 is a wasteful number, since it uses less digits than its factorization.

66242818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26432.

The product of its digits is 36864, while the sum is 37.

The square root of 66242818 is about 8138.9690993393. The cubic root of 66242818 is about 404.6189944206.

The spelling of 66242818 in words is "sixty-six million, two hundred forty-two thousand, eight hundred eighteen".