66535242 has 8 divisors (see below), whose sum is σ = 133070496. Its totient is φ = 22178412.

The previous prime is 66535241. The next prime is 66535253. The reversal of 66535242 is 24253566.

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

66535242 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66535241) 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, 5544598 + ... + 5544609.

It is an arithmetic number, because the mean of its divisors is an integer number (16633812).

Almost surely, 2^66535242 is an apocalyptic number.

66535242 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.

66535242 is a wasteful number, since it uses less digits than its factorization.

66535242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11089212.

The product of its digits is 43200, while the sum is 33.

The square root of 66535242 is about 8156.9137546011. The cubic root of 66535242 is about 405.2135072988.

The spelling of 66535242 in words is "sixty-six million, five hundred thirty-five thousand, two hundred forty-two".