663151212 has 60 divisors (see below), whose sum is σ = 1743776496. Its totient is φ = 219754080.

The previous prime is 663151187. The next prime is 663151219. The reversal of 663151212 is 212151366.

663151212 is a `hidden beast` number, since 6 + 631 + 5 + 1 + 21 + 2 = 666.

663151212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (663151219) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50137 + ... + 61967.

Almost surely, 2^663151212 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 663151212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871888248).

663151212 is an abundant number, since it is smaller than the sum of its proper divisors (1080625284).

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

663151212 is a wasteful number, since it uses less digits than its factorization.

663151212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12020 (or 12009 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 663151212 is about 25751.7225054947. The cubic root of 663151212 is about 872.0422415219.

The spelling of 663151212 in words is "six hundred sixty-three million, one hundred fifty-one thousand, two hundred twelve".