669128160 has 192 divisors, whose sum is σ = 2284837632. Its totient is φ = 163946496.

The previous prime is 669128137. The next prime is 669128227. The reversal of 669128160 is 61821966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349927 + ... + 351833.

It is an arithmetic number, because the mean of its divisors is an integer number (11900196).

Almost surely, 2^669128160 is an apocalyptic number.

669128160 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 669128160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142418816).

669128160 is an abundant number, since it is smaller than the sum of its proper divisors (1615709472).

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

669128160 is a wasteful number, since it uses less digits than its factorization.

669128160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 669128160 is about 25867.5116700467. The cubic root of 669128160 is about 874.6543004440.

The spelling of 669128160 in words is "six hundred sixty-nine million, one hundred twenty-eight thousand, one hundred sixty".