66713711 has 4 divisors (see below), whose sum is σ = 67007832. Its totient is φ = 66419592.

The previous prime is 66713663. The next prime is 66713723. The reversal of 66713711 is 11731766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66713711 - 2¹⁴ = 66697327 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 (66713741) 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 3 ways as a sum of consecutive naturals, for example, 146720 + ... + 147173.

It is an arithmetic number, because the mean of its divisors is an integer number (16751958).

Almost surely, 2^66713711 is an apocalyptic number.

66713711 is a deficient number, since it is larger than the sum of its proper divisors (294121).

66713711 is a wasteful number, since it uses less digits than its factorization.

66713711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294120.

The product of its digits is 5292, while the sum is 32.

The square root of 66713711 is about 8167.8461665240. The cubic root of 66713711 is about 405.5754883248.

The spelling of 66713711 in words is "sixty-six million, seven hundred thirteen thousand, seven hundred eleven".