669722592 has 288 divisors, whose sum is σ = 2289772800. Its totient is φ = 169908480.

The previous prime is 669722587. The next prime is 669722611. The reversal of 669722592 is 295227966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 47 ways as a sum of consecutive naturals, for example, 15574923 + ... + 15574965.

It is an arithmetic number, because the mean of its divisors is an integer number (7950600).

Almost surely, 2^669722592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669722592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144886400).

669722592 is an abundant number, since it is smaller than the sum of its proper divisors (1620050208).

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

669722592 is a wasteful number, since it uses less digits than its factorization.

669722592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 66 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 669722592 is about 25878.9990532864. Note that the first 3 decimals coincide. The cubic root of 669722592 is about 874.9132287288.

The spelling of 669722592 in words is "six hundred sixty-nine million, seven hundred twenty-two thousand, five hundred ninety-two".