669471952128 has 288 divisors, whose sum is σ = 2096115001344. Its totient is φ = 185683746816.

The previous prime is 669471952099. The next prime is 669471952129. The reversal of 669471952128 is 821259174966.

669471952128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669471952129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92888301 + ... + 92895507.

It is an arithmetic number, because the mean of its divisors is an integer number (7278177088).

Almost surely, 2^669471952128 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 669471952128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048057500672).

669471952128 is an abundant number, since it is smaller than the sum of its proper divisors (1426643049216).

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

669471952128 is a wasteful number, since it uses less digits than its factorization.

669471952128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737 (or 7723 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The spelling of 669471952128 in words is "six hundred sixty-nine billion, four hundred seventy-one million, nine hundred fifty-two thousand, one hundred twenty-eight".