669529458 has 48 divisors (see below), whose sum is σ = 1577459520. Its totient is φ = 204001632.

The previous prime is 669529457. The next prime is 669529481. The reversal of 669529458 is 854925966.

It is a happy number.

669529458 is a `hidden beast` number, since 6 + 69 + 529 + 4 + 58 = 666.

It is not an unprimeable number, because it can be changed into a prime (669529453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10213 + ... + 37991.

It is an arithmetic number, because the mean of its divisors is an integer number (32863740).

Almost surely, 2^669529458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669529458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788729760).

669529458 is an abundant number, since it is smaller than the sum of its proper divisors (907930062).

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

669529458 is a wasteful number, since it uses less digits than its factorization.

669529458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27903 (or 27900 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 669529458 is about 25875.2673029671. The cubic root of 669529458 is about 874.8291184125.

The spelling of 669529458 in words is "six hundred sixty-nine million, five hundred twenty-nine thousand, four hundred fifty-eight".