666982422 has 96 divisors (see below), whose sum is σ = 1601233920. Its totient is φ = 199817280.

The previous prime is 666982409. The next prime is 666982429. The reversal of 666982422 is 224289666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666982429) 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 47 ways as a sum of consecutive naturals, for example, 561313 + ... + 562499.

It is an arithmetic number, because the mean of its divisors is an integer number (16679520).

Almost surely, 2^666982422 is an apocalyptic number.

666982422 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 666982422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800616960).

666982422 is an abundant number, since it is smaller than the sum of its proper divisors (934251498).

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

666982422 is a wasteful number, since it uses less digits than its factorization.

666982422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1295 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 666982422 is about 25826.0028266087. The cubic root of 666982422 is about 873.7183618131.

The spelling of 666982422 in words is "six hundred sixty-six million, nine hundred eighty-two thousand, four hundred twenty-two".