669482880 has 128 divisors (see below), whose sum is σ = 2328048000. Its totient is φ = 162293760.

The previous prime is 669482857. The next prime is 669482881. The reversal of 669482880 is 88284966.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×669482880² = 896414653226188800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669482881) 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, 5271 + ... + 36969.

It is an arithmetic number, because the mean of its divisors is an integer number (18187875).

Almost surely, 2^669482880 is an apocalyptic number.

669482880 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 669482880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1164024000).

669482880 is an abundant number, since it is smaller than the sum of its proper divisors (1658565120).

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

669482880 is a wasteful number, since it uses less digits than its factorization.

669482880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31732 (or 31720 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The square root of 669482880 is about 25874.3672386399. The cubic root of 669482880 is about 874.8088311619.

The spelling of 669482880 in words is "six hundred sixty-nine million, four hundred eighty-two thousand, eight hundred eighty".