422155666 has 4 divisors (see below), whose sum is σ = 633233502. Its totient is φ = 211077832.

The previous prime is 422155651. The next prime is 422155673. The reversal of 422155666 is 666551224.

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., 268271641 + 153884025 = 16379^2 + 12405^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105538915 + ... + 105538918.

Almost surely, 2^422155666 is an apocalyptic number.

422155666 is a deficient number, since it is larger than the sum of its proper divisors (211077836).

422155666 is a wasteful number, since it uses less digits than its factorization.

422155666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211077835.

The product of its digits is 86400, while the sum is 37.

The square root of 422155666 is about 20546.4270859923. The cubic root of 422155666 is about 750.1662837228.

The spelling of 422155666 in words is "four hundred twenty-two million, one hundred fifty-five thousand, six hundred sixty-six".