66227156 has 6 divisors (see below), whose sum is σ = 115897530. Its totient is φ = 33113576.

The previous prime is 66227137. The next prime is 66227159. The reversal of 66227156 is 65172266.

It can be written as a sum of positive squares in only one way, i.e., 45832900 + 20394256 = 6770^2 + 4516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66227159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278391 + ... + 8278398.

It is an arithmetic number, because the mean of its divisors is an integer number (19316255).

Almost surely, 2^66227156 is an apocalyptic number.

It is an amenable number.

66227156 is a deficient number, since it is larger than the sum of its proper divisors (49670374).

66227156 is a wasteful number, since it uses less digits than its factorization.

66227156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16556793 (or 16556791 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 66227156 is about 8138.0068812947. The cubic root of 66227156 is about 404.5871034555.

The spelling of 66227156 in words is "sixty-six million, two hundred twenty-seven thousand, one hundred fifty-six".