669069648 has 180 divisors, whose sum is σ = 2135771040. Its totient is φ = 194897664.

The previous prime is 669069647. The next prime is 669069649. The reversal of 669069648 is 846960966.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (669069647) and next prime (669069649).

It is a junction number, because it is equal to n+sod(n) for n = 669069594 and 669069603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669069647) 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 35 ways as a sum of consecutive naturals, for example, 461661 + ... + 463107.

Almost surely, 2^669069648 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 669069648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1067885520).

669069648 is an abundant number, since it is smaller than the sum of its proper divisors (1466701392).

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

669069648 is a wasteful number, since it uses less digits than its factorization.

669069648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The square root of 669069648 is about 25866.3806513397. The cubic root of 669069648 is about 874.6288049474.

The spelling of 669069648 in words is "six hundred sixty-nine million, sixty-nine thousand, six hundred forty-eight".