66042712 has 16 divisors (see below), whose sum is σ = 125929800. Its totient is φ = 32461440.

The previous prime is 66042707. The next prime is 66042749. The reversal of 66042712 is 21724066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69489 + ... + 70432.

Almost surely, 2^66042712 is an apocalyptic number.

It is an amenable number.

66042712 is a deficient number, since it is larger than the sum of its proper divisors (59887088).

66042712 is a wasteful number, since it uses less digits than its factorization.

66042712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139986 (or 139982 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 66042712 is about 8126.6667213563. Note that the first 3 decimals coincide. The cubic root of 66042712 is about 404.2111597503.

Adding to 66042712 its reverse (21724066), we get a palindrome (87766778).

It can be divided in two parts, 6604 and 2712, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 66042712 in words is "sixty-six million, forty-two thousand, seven hundred twelve".