669484494000 has 1920 divisors, whose sum is σ = 3011907225600. Its totient is φ = 138848256000.

The previous prime is 669484493989. The next prime is 669484494001. The reversal of 669484494000 is 494484966.

It is a happy number.

669484494000 is a `hidden beast` number, since 66 + 94 + 8 + 4 + 494 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (669484494001) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 6901901952 + ... + 6901902048.

It is an arithmetic number, because the mean of its divisors is an integer number (1568701680).

Almost surely, 2^669484494000 is an apocalyptic number.

669484494000 is a gapful number since it is divisible by the number (60) 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 669484494000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505953612800).

669484494000 is an abundant number, since it is smaller than the sum of its proper divisors (2342422731600).

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

669484494000 is a wasteful number, since it uses less digits than its factorization.

669484494000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 669484494000 in words is "six hundred sixty-nine billion, four hundred eighty-four million, four hundred ninety-four thousand".