66213242 has 8 divisors (see below), whose sum is σ = 99597600. Its totient is φ = 33014044.

The previous prime is 66213211. The next prime is 66213247. The reversal of 66213242 is 24231266.

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

It is not an unprimeable number, because it can be changed into a prime (66213247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45392 + ... + 46827.

It is an arithmetic number, because the mean of its divisors is an integer number (12449700).

Almost surely, 2^66213242 is an apocalyptic number.

66213242 is a deficient number, since it is larger than the sum of its proper divisors (33384358).

66213242 is a wasteful number, since it uses less digits than its factorization.

66213242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92580.

The product of its digits is 3456, while the sum is 26.

The square root of 66213242 is about 8137.1519587630. The cubic root of 66213242 is about 404.5587675503.

The spelling of 66213242 in words is "sixty-six million, two hundred thirteen thousand, two hundred forty-two".