669458148 has 96 divisors (see below), whose sum is σ = 1672151040. Its totient is φ = 208010880.

The previous prime is 669458143. The next prime is 669458189. The reversal of 669458148 is 841854966.

It is a self number, because there is not a number n which added to its sum of digits gives 669458148.

It is not an unprimeable number, because it can be changed into a prime (669458143) 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, 2488558 + ... + 2488826.

It is an arithmetic number, because the mean of its divisors is an integer number (17418240).

Almost surely, 2^669458148 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 669458148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836075520).

669458148 is an abundant number, since it is smaller than the sum of its proper divisors (1002692892).

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

669458148 is a wasteful number, since it uses less digits than its factorization.

669458148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 495 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 669458148 is about 25873.8893094950. The cubic root of 669458148 is about 874.7980586492.

The spelling of 669458148 in words is "six hundred sixty-nine million, four hundred fifty-eight thousand, one hundred forty-eight".