665450630112 has 48 divisors (see below), whose sum is σ = 1746849888000. Its totient is φ = 221811545472.

The previous prime is 665450630111. The next prime is 665450630113. The reversal of 665450630112 is 211036054566.

It is an interprime number because it is at equal distance from previous prime (665450630111) and next prime (665450630113).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×665450630112² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665450630111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7694889 + ... + 7780887.

It is an arithmetic number, because the mean of its divisors is an integer number (36392706000).

Almost surely, 2^665450630112 is an apocalyptic number.

It is an amenable number.

665450630112 is an abundant number, since it is smaller than the sum of its proper divisors (1081399257888).

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

665450630112 is a wasteful number, since it uses less digits than its factorization.

665450630112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166615 (or 166607 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 665450630112 its reverse (211036054566), we get a palindrome (876486684678).

The spelling of 665450630112 in words is "six hundred sixty-five billion, four hundred fifty million, six hundred thirty thousand, one hundred twelve".