660210012 has 72 divisors (see below), whose sum is σ = 2080670592. Its totient is φ = 171482400.

The previous prime is 660209999. The next prime is 660210073. The reversal of 660210012 is 210012066.

It is a happy number.

660210012 is a `hidden beast` number, since 660 + 2 + 1 + 0 + 0 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116314 + ... + 121857.

Almost surely, 2^660210012 is an apocalyptic number.

It is an amenable number.

660210012 is an abundant number, since it is smaller than the sum of its proper divisors (1420460580).

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

660210012 is a wasteful number, since it uses less digits than its factorization.

660210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238199 (or 238194 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 660210012 is about 25694.5521852396. The cubic root of 660210012 is about 870.7511071975.

Adding to 660210012 its reverse (210012066), we get a palindrome (870222078).

The spelling of 660210012 in words is "six hundred sixty million, two hundred ten thousand, twelve".