66751242 has 16 divisors (see below), whose sum is σ = 133592160. Its totient is φ = 22235472.

The previous prime is 66751193. The next prime is 66751249. The reversal of 66751242 is 24215766.

It is not an unprimeable number, because it can be changed into a prime (66751249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9609 + ... + 15027.

It is an arithmetic number, because the mean of its divisors is an integer number (8349510).

Almost surely, 2^66751242 is an apocalyptic number.

66751242 is an abundant number, since it is smaller than the sum of its proper divisors (66840918).

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

66751242 is a wasteful number, since it uses less digits than its factorization.

66751242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477.

The product of its digits is 20160, while the sum is 33.

The square root of 66751242 is about 8170.1433279961. The cubic root of 66751242 is about 405.6515286665.

The spelling of 66751242 in words is "sixty-six million, seven hundred fifty-one thousand, two hundred forty-two".