622512666 has 48 divisors (see below), whose sum is σ = 1421676360. Its totient is φ = 196560000.

The previous prime is 622512661. The next prime is 622512673. The reversal of 622512666 is 666215226.

It can be written as a sum of positive squares in 4 ways, for example, as 613602441 + 8910225 = 24771^2 + 2985^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 622512666.

It is not an unprimeable number, because it can be changed into a prime (622512661) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 16416 + ... + 38916.

Almost surely, 2^622512666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622512666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710838180).

622512666 is an abundant number, since it is smaller than the sum of its proper divisors (799163694).

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

622512666 is a wasteful number, since it uses less digits than its factorization.

622512666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22591 (or 22588 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 622512666 is about 24950.2037266232. The cubic root of 622512666 is about 853.8522570372.

The spelling of 622512666 in words is "six hundred twenty-two million, five hundred twelve thousand, six hundred sixty-six".