669466368 has 216 divisors, whose sum is σ = 2086964880. Its totient is φ = 205701120.

The previous prime is 669466361. The next prime is 669466379. The reversal of 669466368 is 863664966.

It is a super-2 number, since 2×669466368² = 896370435766222848, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669466361) 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, 1794630 + ... + 1795002.

Almost surely, 2^669466368 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 669466368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043482440).

669466368 is an abundant number, since it is smaller than the sum of its proper divisors (1417498512).

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

669466368 is a wasteful number, since it uses less digits than its factorization.

669466368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 438 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The square root of 669466368 is about 25874.0481564057. The cubic root of 669466368 is about 874.8016390625.

The spelling of 669466368 in words is "six hundred sixty-nine million, four hundred sixty-six thousand, three hundred sixty-eight".