669480 has 64 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 152832.

The previous prime is 669479. The next prime is 669481. The reversal of 669480 is 84966.

It is an interprime number because it is at equal distance from previous prime (669479) and next prime (669481).

It is not an unprimeable number, because it can be changed into a prime (669481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442 + ... + 1238.

It is an arithmetic number, because the mean of its divisors is an integer number (35910).

2⁶⁶⁹⁴⁸⁰ is an apocalyptic number.

669480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149120).

669480 is an abundant number, since it is smaller than the sum of its proper divisors (1628760).

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

669480 is a wasteful number, since it uses less digits than its factorization.

669480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 669480 is about 818.2175749762. The cubic root of 669480 is about 87.4807576734.

The spelling of 669480 in words is "six hundred sixty-nine thousand, four hundred eighty".