66243892 has 24 divisors (see below), whose sum is σ = 136194912. Its totient is φ = 27794400.

The previous prime is 66243889. The next prime is 66243893. The reversal of 66243892 is 29834266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66243893) 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, 57334 + ... + 58477.

It is an arithmetic number, because the mean of its divisors is an integer number (5674788).

Almost surely, 2^66243892 is an apocalyptic number.

It is an amenable number.

66243892 is an abundant number, since it is smaller than the sum of its proper divisors (69951020).

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

66243892 is a wasteful number, since it uses less digits than its factorization.

66243892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115839 (or 115837 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 66243892 is about 8139.0350779438. The cubic root of 66243892 is about 404.6211811153.

The spelling of 66243892 in words is "sixty-six million, two hundred forty-three thousand, eight hundred ninety-two".