66226999 has 2 divisors, whose sum is σ = 66227000. Its totient is φ = 66226998.

The previous prime is 66226949. The next prime is 66227011. The reversal of 66226999 is 99962266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66226999 - 2⁹ = 66226487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66226949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113499 + 33113500.

It is an arithmetic number, because the mean of its divisors is an integer number (33113500).

Almost surely, 2^66226999 is an apocalyptic number.

66226999 is a deficient number, since it is larger than the sum of its proper divisors (1).

66226999 is an equidigital number, since it uses as much as digits as its factorization.

66226999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 49.

The square root of 66226999 is about 8137.9972351925. The cubic root of 66226999 is about 404.5867837467.

The spelling of 66226999 in words is "sixty-six million, two hundred twenty-six thousand, nine hundred ninety-nine".