669487276080 has 640 divisors, whose sum is σ = 2691367741440. Its totient is φ = 149812346880.

The previous prime is 669487276079. The next prime is 669487276099. The reversal of 669487276080 is 80672784966.

669487276080 is a `hidden beast` number, since 6 + 6 + 9 + 487 + 2 + 76 + 0 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 669487275999 and 669487276017.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 141808120 + ... + 141812840.

It is an arithmetic number, because the mean of its divisors is an integer number (4205262096).

Almost surely, 2^669487276080 is an apocalyptic number.

669487276080 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 669487276080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345683870720).

669487276080 is an abundant number, since it is smaller than the sum of its proper divisors (2021880465360).

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

669487276080 is a wasteful number, since it uses less digits than its factorization.

669487276080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946 (or 4934 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 669487276080 in words is "six hundred sixty-nine billion, four hundred eighty-seven million, two hundred seventy-six thousand, eighty".