66942712 has 16 divisors (see below), whose sum is σ = 125611200. Its totient is φ = 33446400.

The previous prime is 66942697. The next prime is 66942713. The reversal of 66942712 is 21724966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66942713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13464 + ... + 17752.

It is an arithmetic number, because the mean of its divisors is an integer number (7850700).

Almost surely, 2^66942712 is an apocalyptic number.

It is an amenable number.

66942712 is a deficient number, since it is larger than the sum of its proper divisors (58668488).

66942712 is a wasteful number, since it uses less digits than its factorization.

66942712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6246 (or 6242 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 66942712 is about 8181.8526019478. The cubic root of 66942712 is about 406.0390168526.

The spelling of 66942712 in words is "sixty-six million, nine hundred forty-two thousand, seven hundred twelve".