622166556 has 96 divisors (see below), whose sum is σ = 1625315328. Its totient is φ = 183648960.

The previous prime is 622166471. The next prime is 622166557. The reversal of 622166556 is 655661226.

It is a happy number.

It is a super-2 number, since 2×622166556² = 774182446809802272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622166557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 910591 + ... + 911273.

It is an arithmetic number, because the mean of its divisors is an integer number (16930368).

Almost surely, 2^622166556 is an apocalyptic number.

622166556 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622166556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812657664).

622166556 is an abundant number, since it is smaller than the sum of its proper divisors (1003148772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

622166556 is a wasteful number, since it uses less digits than its factorization.

622166556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 869 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 622166556 is about 24943.2667467595. The cubic root of 622166556 is about 853.6939836356.

The spelling of 622166556 in words is "six hundred twenty-two million, one hundred sixty-six thousand, five hundred fifty-six".