66225711 has 4 divisors (see below), whose sum is σ = 88300952. Its totient is φ = 44150472.

The previous prime is 66225707. The next prime is 66225713. The reversal of 66225711 is 11752266.

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

It is not a de Polignac number, because 66225711 - 2² = 66225707 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 (66225713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11037616 + ... + 11037621.

It is an arithmetic number, because the mean of its divisors is an integer number (22075238).

Almost surely, 2^66225711 is an apocalyptic number.

66225711 is a deficient number, since it is larger than the sum of its proper divisors (22075241).

66225711 is a wasteful number, since it uses less digits than its factorization.

66225711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22075240.

The product of its digits is 5040, while the sum is 30.

The square root of 66225711 is about 8137.9180998582. The cubic root of 66225711 is about 404.5841608931.

Adding to 66225711 its reverse (11752266), we get a palindrome (77977977).

It can be divided in two parts, 662257 and 11, that multiplied together give a palindrome (7284827).

The spelling of 66225711 in words is "sixty-six million, two hundred twenty-five thousand, seven hundred eleven".