665556622 has 8 divisors (see below), whose sum is σ = 1012010976. Its totient is φ = 328219632.

The previous prime is 665556601. The next prime is 665556637. The reversal of 665556622 is 226655566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2279158 + ... + 2279449.

It is an arithmetic number, because the mean of its divisors is an integer number (126501372).

Almost surely, 2^665556622 is an apocalyptic number.

665556622 is a deficient number, since it is larger than the sum of its proper divisors (346454354).

665556622 is a wasteful number, since it uses less digits than its factorization.

665556622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558682.

The product of its digits is 648000, while the sum is 43.

The square root of 665556622 is about 25798.3840966833. The cubic root of 665556622 is about 873.0953387129.

The spelling of 665556622 in words is "six hundred sixty-five million, five hundred fifty-six thousand, six hundred twenty-two".