664410276 has 60 divisors (see below), whose sum is σ = 1756491660. Its totient is φ = 218972160.

The previous prime is 664410251. The next prime is 664410287. The reversal of 664410276 is 672014466.

664410276 is a `hidden beast` number, since 6 + 644 + 1 + 0 + 2 + 7 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 129413376 + 534996900 = 11376^2 + 23130^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 664410276.

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 19 ways as a sum of consecutive naturals, for example, 17316 + ... + 40356.

It is an arithmetic number, because the mean of its divisors is an integer number (29274861).

Almost surely, 2^664410276 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 664410276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878245830).

664410276 is an abundant number, since it is smaller than the sum of its proper divisors (1092081384).

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

664410276 is a wasteful number, since it uses less digits than its factorization.

664410276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23146 (or 23135 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 664410276 is about 25776.1571224261. The cubic root of 664410276 is about 872.5937813224.

The spelling of 664410276 in words is "six hundred sixty-four million, four hundred ten thousand, two hundred seventy-six".