66031226 has 4 divisors (see below), whose sum is σ = 99046842. Its totient is φ = 33015612.

The previous prime is 66031223. The next prime is 66031241. The reversal of 66031226 is 62213066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62213066 = 2 ⋅31106533.

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 5175625 = 7801^2 + 2275^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66031195 and 66031204.

It is not an unprimeable number, because it can be changed into a prime (66031223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16507805 + ... + 16507808.

Almost surely, 2^66031226 is an apocalyptic number.

66031226 is a deficient number, since it is larger than the sum of its proper divisors (33015616).

66031226 is a wasteful number, since it uses less digits than its factorization.

66031226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33015615.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66031226 is about 8125.9600048240. The cubic root of 66031226 is about 404.1877252262.

The spelling of 66031226 in words is "sixty-six million, thirty-one thousand, two hundred twenty-six".