66212142 has 8 divisors (see below), whose sum is σ = 132424296. Its totient is φ = 22070712.

The previous prime is 66212137. The next prime is 66212149. The reversal of 66212142 is 24121266.

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

66212142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66212149) 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, 5517673 + ... + 5517684.

It is an arithmetic number, because the mean of its divisors is an integer number (16553037).

Almost surely, 2^66212142 is an apocalyptic number.

66212142 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.

66212142 is a wasteful number, since it uses less digits than its factorization.

66212142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11035362.

The product of its digits is 1152, while the sum is 24.

The square root of 66212142 is about 8137.0843672657. The cubic root of 66212142 is about 404.5565272275.

The spelling of 66212142 in words is "sixty-six million, two hundred twelve thousand, one hundred forty-two".