669692160144 has 240 divisors, whose sum is σ = 2214624921600. Its totient is φ = 184918256640.

The previous prime is 669692160127. The next prime is 669692160149. The reversal of 669692160144 is 441061296966.

669692160144 is a `hidden beast` number, since 6 + 6 + 9 + 6 + 9 + 21 + 601 + 4 + 4 = 666.

669692160144 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (669692160149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5496849 + ... + 5617359.

It is an arithmetic number, because the mean of its divisors is an integer number (9227603840).

Almost surely, 2^669692160144 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 669692160144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1107312460800).

669692160144 is an abundant number, since it is smaller than the sum of its proper divisors (1544932761456).

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

669692160144 is a wasteful number, since it uses less digits than its factorization.

669692160144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120718 (or 120709 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 669692160144 in words is "six hundred sixty-nine billion, six hundred ninety-two million, one hundred sixty thousand, one hundred forty-four".