66666711 has 8 divisors (see below), whose sum is σ = 91291504. Its totient is φ = 43243200.

The previous prime is 66666683. The next prime is 66666713. The reversal of 66666711 is 11766666.

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

It is not a de Polignac number, because 66666711 - 2⁹ = 66666199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66666711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300190 + ... + 300411.

It is an arithmetic number, because the mean of its divisors is an integer number (11411438).

Almost surely, 2^66666711 is an apocalyptic number.

66666711 is a deficient number, since it is larger than the sum of its proper divisors (24624793).

66666711 is a wasteful number, since it uses less digits than its factorization.

66666711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600641.

The product of its digits is 54432, while the sum is 39.

The square root of 66666711 is about 8164.9685241279. The cubic root of 66666711 is about 405.4802229196.

It can be divided in two parts, 666667 and 11, that multiplied together give a palindrome (7333337).

The spelling of 66666711 in words is "sixty-six million, six hundred sixty-six thousand, seven hundred eleven".