66042711 has 24 divisors (see below), whose sum is σ = 111562880. Its totient is φ = 36859536.

The previous prime is 66042707. The next prime is 66042749. The reversal of 66042711 is 11724066.

It is not a de Polignac number, because 66042711 - 2² = 66042707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66042791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9481 + ... + 14898.

Almost surely, 2^66042711 is an apocalyptic number.

66042711 is a deficient number, since it is larger than the sum of its proper divisors (45520169).

66042711 is a wasteful number, since it uses less digits than its factorization.

66042711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24435 (or 24432 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 66042711 is about 8126.6666598305. Note that the first 4 decimals coincide. The cubic root of 66042711 is about 404.2111577101.

Adding to 66042711 its reverse (11724066), we get a palindrome (77766777).

The spelling of 66042711 in words is "sixty-six million, forty-two thousand, seven hundred eleven".