665470028160 has 1280 divisors, whose sum is σ = 2794118215680.
Its totient is φ = 147806208000.
The previous prime is 665470028123. The next prime is 665470028191. The reversal of 665470028160 is 61820074566.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2455608825 + ... + 2455609095.
It is an arithmetic number, because the mean of its divisors is an integer number (2182904856).
Almost surely, 2665470028160 is an apocalyptic number.
665470028160 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 665470028160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397059107840).
665470028160 is an abundant number, since it is smaller than the sum of its proper divisors (2128648187520).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
665470028160 is a wasteful number, since it uses less digits than its factorization.
665470028160 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 477 (or 456 counting only the distinct ones).
The product of its (nonzero) digits is 483840, while the sum is 45.
The spelling of 665470028160 in words is "six hundred sixty-five billion, four hundred seventy million, twenty-eight thousand, one hundred sixty".