667440334100 has 36 divisors (see below), whose sum is σ = 1448579839644. Its totient is φ = 266932942080.

The previous prime is 667440334097. The next prime is 667440334111. The reversal of 667440334100 is 1433044766.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 22958916484 + 644481417616 = 151522^2 + 802796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84914 + ... + 1158486.

It is an arithmetic number, because the mean of its divisors is an integer number (40238328879).

Almost surely, 2^667440334100 is an apocalyptic number.

It is an amenable number.

667440334100 is an abundant number, since it is smaller than the sum of its proper divisors (781139505544).

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

667440334100 is a wasteful number, since it uses less digits than its factorization.

667440334100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079804 (or 1079797 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

Adding to 667440334100 its reverse (1433044766), we get a palindrome (668873378866).

The spelling of 667440334100 in words is "six hundred sixty-seven billion, four hundred forty million, three hundred thirty-four thousand, one hundred".