66442292 has 48 divisors (see below), whose sum is σ = 136539648. Its totient is φ = 27704160.

The previous prime is 66442291. The next prime is 66442301. The reversal of 66442292 is 29224466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66442291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200567 + ... + 200897.

It is an arithmetic number, because the mean of its divisors is an integer number (2844576).

Almost surely, 2^66442292 is an apocalyptic number.

It is an amenable number.

66442292 is an abundant number, since it is smaller than the sum of its proper divisors (70097356).

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

66442292 is a wasteful number, since it uses less digits than its factorization.

66442292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 514 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 66442292 is about 8151.2141426906. The cubic root of 66442292 is about 405.0247243962.

The spelling of 66442292 in words is "sixty-six million, four hundred forty-two thousand, two hundred ninety-two".