665358480 has 60 divisors (see below), whose sum is σ = 2234497980. Its totient is φ = 177428736.

The previous prime is 665358469. The next prime is 665358509. The reversal of 665358480 is 84853566.

665358480 is a `hidden beast` number, since 6 + 65 + 3 + 584 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 442513296 + 222845184 = 21036^2 + 14928^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461335 + ... + 462774.

It is an arithmetic number, because the mean of its divisors is an integer number (37241633).

Almost surely, 2^665358480 is an apocalyptic number.

665358480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665358480 is an abundant number, since it is smaller than the sum of its proper divisors (1569139500).

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

665358480 is a wasteful number, since it uses less digits than its factorization.

665358480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924128 (or 924119 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 665358480 is about 25794.5436090659. The cubic root of 665358480 is about 873.0086874192.

The spelling of 665358480 in words is "six hundred sixty-five million, three hundred fifty-eight thousand, four hundred eighty".