669610128 has 160 divisors (see below), whose sum is σ = 1951875072. Its totient is φ = 197704320.

The previous prime is 669610111. The next prime is 669610153. The reversal of 669610128 is 821016966.

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, 3002625 + ... + 3002847.

Almost surely, 2^669610128 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 669610128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975937536).

669610128 is an abundant number, since it is smaller than the sum of its proper divisors (1282264944).

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

669610128 is a wasteful number, since it uses less digits than its factorization.

669610128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 286 counting only the distinct ones).

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

The square root of 669610128 is about 25876.8260804914. The cubic root of 669610128 is about 874.8642523561.

The spelling of 669610128 in words is "six hundred sixty-nine million, six hundred ten thousand, one hundred twenty-eight".