66607711 has 8 divisors (see below), whose sum is σ = 70257920. Its totient is φ = 62971992.

The previous prime is 66607679. The next prime is 66607741. The reversal of 66607711 is 11770666.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66607711 - 2⁵ = 66607679 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 (66607741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6586 + ... + 13288.

It is an arithmetic number, because the mean of its divisors is an integer number (8782240).

Almost surely, 2^66607711 is an apocalyptic number.

66607711 is a deficient number, since it is larger than the sum of its proper divisors (3650209).

66607711 is a wasteful number, since it uses less digits than its factorization.

66607711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7245.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 66607711 is about 8161.3547282299. The cubic root of 66607711 is about 405.3605710292.

The spelling of 66607711 in words is "sixty-six million, six hundred seven thousand, seven hundred eleven".