665156112 has 40 divisors (see below), whose sum is σ = 1719619104. Its totient is φ = 221551104.

The previous prime is 665156111. The next prime is 665156117. The reversal of 665156112 is 211651566.

It is not an unprimeable number, because it can be changed into a prime (665156111) 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, 70083 + ... + 79005.

Almost surely, 2^665156112 is an apocalyptic number.

It is an amenable number.

665156112 is an abundant number, since it is smaller than the sum of its proper divisors (1054462992).

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

665156112 is a wasteful number, since it uses less digits than its factorization.

665156112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10487 (or 10481 counting only the distinct ones).

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

The square root of 665156112 is about 25790.6206206830. The cubic root of 665156112 is about 872.9201702556.

It can be divided in two parts, 66515 and 6112, that added together give a palindrome (72627).

The spelling of 665156112 in words is "six hundred sixty-five million, one hundred fifty-six thousand, one hundred twelve".