669373560144 has 240 divisors, whose sum is σ = 1995521236800. Its totient is φ = 208857636864.

The previous prime is 669373560109. The next prime is 669373560179. The reversal of 669373560144 is 441065373966.

669373560144 is a `hidden beast` number, since 6 + 6 + 9 + 3 + 73 + 560 + 1 + 4 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (669373560109) and next prime (669373560179).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196122982 + ... + 196126394.

It is an arithmetic number, because the mean of its divisors is an integer number (8314671820).

Almost surely, 2^669373560144 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 669373560144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997760618400).

669373560144 is an abundant number, since it is smaller than the sum of its proper divisors (1326147676656).

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

669373560144 is a wasteful number, since it uses less digits than its factorization.

669373560144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282 (or 4273 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 669373560144 in words is "six hundred sixty-nine billion, three hundred seventy-three million, five hundred sixty thousand, one hundred forty-four".