669033061728 has 192 divisors, whose sum is σ = 1886660149248. Its totient is φ = 206851276800.

The previous prime is 669033061667. The next prime is 669033061729. The reversal of 669033061728 is 827160330966.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669033061729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31286176 + ... + 31307552.

It is an arithmetic number, because the mean of its divisors is an integer number (9826354944).

Almost surely, 2^669033061728 is an apocalyptic number.

669033061728 is a gapful number since it is divisible by the number (68) 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 669033061728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943330074624).

669033061728 is an abundant number, since it is smaller than the sum of its proper divisors (1217627087520).

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

669033061728 is a wasteful number, since it uses less digits than its factorization.

669033061728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21685 (or 21677 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 669033061728 in words is "six hundred sixty-nine billion, thirty-three million, sixty-one thousand, seven hundred twenty-eight".