660161212 has 6 divisors (see below), whose sum is σ = 1155282128. Its totient is φ = 330080604.

The previous prime is 660161189. The next prime is 660161219. The reversal of 660161212 is 212161066.

660161212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660161219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82520148 + ... + 82520155.

Almost surely, 2^660161212 is an apocalyptic number.

It is an amenable number.

660161212 is a deficient number, since it is larger than the sum of its proper divisors (495120916).

660161212 is a wasteful number, since it uses less digits than its factorization.

660161212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165040307 (or 165040305 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 660161212 is about 25693.6025500512. The cubic root of 660161212 is about 870.7296525592.

The spelling of 660161212 in words is "six hundred sixty million, one hundred sixty-one thousand, two hundred twelve".