422215666 has 4 divisors (see below), whose sum is σ = 633323502. Its totient is φ = 211107832.

The previous prime is 422215631. The next prime is 422215681. The reversal of 422215666 is 666512224.

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

It can be written as a sum of positive squares in only one way, i.e., 346890625 + 75325041 = 18625^2 + 8679^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105553915 + ... + 105553918.

Almost surely, 2^422215666 is an apocalyptic number.

422215666 is a deficient number, since it is larger than the sum of its proper divisors (211107836).

422215666 is a wasteful number, since it uses less digits than its factorization.

422215666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211107835.

The product of its digits is 34560, while the sum is 34.

The square root of 422215666 is about 20547.8871419910. The cubic root of 422215666 is about 750.2018218339.

The spelling of 422215666 in words is "four hundred twenty-two million, two hundred fifteen thousand, six hundred sixty-six".