66226651 has 2 divisors, whose sum is σ = 66226652. Its totient is φ = 66226650.

The previous prime is 66226583. The next prime is 66226697. The reversal of 66226651 is 15662266.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66226651 is a prime.

It is not a weakly prime, because it can be changed into another prime (66226151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113325 + 33113326.

It is an arithmetic number, because the mean of its divisors is an integer number (33113326).

Almost surely, 2^66226651 is an apocalyptic number.

66226651 is a deficient number, since it is larger than the sum of its proper divisors (1).

66226651 is an equidigital number, since it uses as much as digits as its factorization.

66226651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 66226651 is about 8137.9758539824. The cubic root of 66226651 is about 404.5860750908.

The spelling of 66226651 in words is "sixty-six million, two hundred twenty-six thousand, six hundred fifty-one".