669017088 has 132 divisors (see below), whose sum is σ = 1946328540. Its totient is φ = 221331456.

The previous prime is 669017081. The next prime is 669017117. The reversal of 669017088 is 880710966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 325730304 + 343286784 = 18048^2 + 18528^2 .

It is not an unprimeable number, because it can be changed into a prime (669017081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2110306 + ... + 2110622.

Almost surely, 2^669017088 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 669017088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973164270).

669017088 is an abundant number, since it is smaller than the sum of its proper divisors (1277311452).

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

669017088 is a wasteful number, since it uses less digits than its factorization.

669017088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 669017088 is about 25865.3646407701. The cubic root of 669017088 is about 874.6059016548.

The spelling of 669017088 in words is "six hundred sixty-nine million, seventeen thousand, eighty-eight".