669294080 has 320 divisors, whose sum is σ = 2103615360. Its totient is φ = 199360512.

The previous prime is 669294079. The next prime is 669294107. The reversal of 669294080 is 80492966.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39370232 + ... + 39370248.

It is an arithmetic number, because the mean of its divisors is an integer number (6573798).

Almost surely, 2^669294080 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 669294080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051807680).

669294080 is an abundant number, since it is smaller than the sum of its proper divisors (1434321280).

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

669294080 is an equidigital number, since it uses as much as digits as its factorization.

669294080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 669294080 is about 25870.7185829849. The cubic root of 669294080 is about 874.7265888619.

The spelling of 669294080 in words is "six hundred sixty-nine million, two hundred ninety-four thousand, eighty".