665430541860 has 288 divisors, whose sum is σ = 2179018800000. Its totient is φ = 151285929984.

The previous prime is 665430541849. The next prime is 665430541861. The reversal of 665430541860 is 68145034566.

It is not an unprimeable number, because it can be changed into a prime (665430541861) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 600026986 + ... + 600028094.

It is an arithmetic number, because the mean of its divisors is an integer number (7566037500).

Almost surely, 2^665430541860 is an apocalyptic number.

665430541860 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 665430541860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089509400000).

665430541860 is an abundant number, since it is smaller than the sum of its proper divisors (1513588258140).

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

665430541860 is a wasteful number, since it uses less digits than its factorization.

665430541860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 665430541860 in words is "six hundred sixty-five billion, four hundred thirty million, five hundred forty-one thousand, eight hundred sixty".