66431711 has 8 divisors (see below), whose sum is σ = 67620000. Its totient is φ = 65253888.

The previous prime is 66431681. The next prime is 66431731. The reversal of 66431711 is 11713466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66431711 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 (66431731) 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 7 ways as a sum of consecutive naturals, for example, 10790 + ... + 15788.

It is an arithmetic number, because the mean of its divisors is an integer number (8452500).

Almost surely, 2^66431711 is an apocalyptic number.

66431711 is a deficient number, since it is larger than the sum of its proper divisors (1188289).

66431711 is a wasteful number, since it uses less digits than its factorization.

66431711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5233.

The product of its digits is 3024, while the sum is 29.

The square root of 66431711 is about 8150.5650724352. The cubic root of 66431711 is about 405.0032230603.

The spelling of 66431711 in words is "sixty-six million, four hundred thirty-one thousand, seven hundred eleven".