66718012 has 6 divisors (see below), whose sum is σ = 116756528. Its totient is φ = 33359004.

The previous prime is 66717953. The next prime is 66718021. The reversal of 66718012 is 21081766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8339748 + ... + 8339755.

Almost surely, 2^66718012 is an apocalyptic number.

It is an amenable number.

66718012 is a deficient number, since it is larger than the sum of its proper divisors (50038516).

66718012 is a wasteful number, since it uses less digits than its factorization.

66718012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16679507 (or 16679505 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 66718012 is about 8168.1094507848. The cubic root of 66718012 is about 405.5842038880.

Adding to 66718012 its reverse (21081766), we get a palindrome (87799778).

The spelling of 66718012 in words is "sixty-six million, seven hundred eighteen thousand, twelve".