669836770560 has 864 divisors, whose sum is σ = 2505036398592. Its totient is φ = 171186462720.

The previous prime is 669836770523. The next prime is 669836770579. The reversal of 669836770560 is 65077638966.

669836770560 is a `hidden beast` number, since 6 + 6 + 9 + 8 + 3 + 67 + 7 + 0 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1224564207 + ... + 1224564753.

Almost surely, 2^669836770560 is an apocalyptic number.

669836770560 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 669836770560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252518199296).

669836770560 is an abundant number, since it is smaller than the sum of its proper divisors (1835199628032).

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

669836770560 is a wasteful number, since it uses less digits than its factorization.

669836770560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 63.

The spelling of 669836770560 in words is "six hundred sixty-nine billion, eight hundred thirty-six million, seven hundred seventy thousand, five hundred sixty".