66726711 has 6 divisors (see below), whose sum is σ = 96383040. Its totient is φ = 44484468.

The previous prime is 66726701. The next prime is 66726713. The reversal of 66726711 is 11762766.

It is not a de Polignac number, because 66726711 - 2⁹ = 66726199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66726713) 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 5 ways as a sum of consecutive naturals, for example, 3707031 + ... + 3707048.

It is an arithmetic number, because the mean of its divisors is an integer number (16063840).

Almost surely, 2^66726711 is an apocalyptic number.

66726711 is a deficient number, since it is larger than the sum of its proper divisors (29656329).

66726711 is a wasteful number, since it uses less digits than its factorization.

66726711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414085 (or 7414082 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 66726711 is about 8168.6419311903. The cubic root of 66726711 is about 405.6018304307.

The spelling of 66726711 in words is "sixty-six million, seven hundred twenty-six thousand, seven hundred eleven".