664802228750 has 80 divisors (see below), whose sum is σ = 1364448674160. Its totient is φ = 240846240000.

The previous prime is 664802228747. The next prime is 664802228759. The reversal of 664802228750 is 57822208466.

It is a happy number.

664802228750 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664802228759) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3608882 + ... + 3788618.

It is an arithmetic number, because the mean of its divisors is an integer number (17055608427).

Almost surely, 2^664802228750 is an apocalyptic number.

664802228750 is an abundant number, since it is smaller than the sum of its proper divisors (699646445410).

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

664802228750 is a wasteful number, since it uses less digits than its factorization.

664802228750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180039 (or 180024 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 664802228750 in words is "six hundred sixty-four billion, eight hundred two million, two hundred twenty-eight thousand, seven hundred fifty".