665651112 has 64 divisors (see below), whose sum is σ = 1914049920. Its totient is φ = 188967168.

The previous prime is 665651101. The next prime is 665651131. The reversal of 665651112 is 211156566.

665651112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×665651112³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13758 + ... + 38994.

It is an arithmetic number, because the mean of its divisors is an integer number (29907030).

Almost surely, 2^665651112 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 665651112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957024960).

665651112 is an abundant number, since it is smaller than the sum of its proper divisors (1248398808).

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

665651112 is a wasteful number, since it uses less digits than its factorization.

665651112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25410 (or 25406 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 665651112 is about 25800.2153479385. The cubic root of 665651112 is about 873.1366549446.

The spelling of 665651112 in words is "six hundred sixty-five million, six hundred fifty-one thousand, one hundred twelve".