66964242 has 8 divisors (see below), whose sum is σ = 133928496. Its totient is φ = 22321412.

The previous prime is 66964231. The next prime is 66964243. The reversal of 66964242 is 24246966.

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

66964242 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66964242.

It is not an unprimeable number, because it can be changed into a prime (66964243) 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, 5580348 + ... + 5580359.

It is an arithmetic number, because the mean of its divisors is an integer number (16741062).

Almost surely, 2^66964242 is an apocalyptic number.

66964242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66964242 is a wasteful number, since it uses less digits than its factorization.

66964242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11160712.

The product of its digits is 124416, while the sum is 39.

The square root of 66964242 is about 8183.1682128623. The cubic root of 66964242 is about 406.0825420438.

The spelling of 66964242 in words is "sixty-six million, nine hundred sixty-four thousand, two hundred forty-two".