66889782 has 24 divisors (see below), whose sum is σ = 145371096. Its totient is φ = 22228416.

The previous prime is 66889777. The next prime is 66889793. The reversal of 66889782 is 28798866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553 + ... + 11579.

It is an arithmetic number, because the mean of its divisors is an integer number (6057129).

Almost surely, 2^66889782 is an apocalyptic number.

66889782 is an abundant number, since it is smaller than the sum of its proper divisors (78481314).

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

66889782 is a wasteful number, since it uses less digits than its factorization.

66889782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11372 (or 11369 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 66889782 is about 8178.6173648117. The cubic root of 66889782 is about 405.9319735250.

The spelling of 66889782 in words is "sixty-six million, eight hundred eighty-nine thousand, seven hundred eighty-two".