660523412 has 12 divisors (see below), whose sum is σ = 1166719680. Its totient is φ = 327174936.

The previous prime is 660523411. The next prime is 660523427. The reversal of 660523412 is 214325066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660523411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771212 + ... + 772067.

It is an arithmetic number, because the mean of its divisors is an integer number (97226640).

Almost surely, 2^660523412 is an apocalyptic number.

It is an amenable number.

660523412 is a deficient number, since it is larger than the sum of its proper divisors (506196268).

660523412 is a wasteful number, since it uses less digits than its factorization.

660523412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543390 (or 1543388 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 660523412 is about 25700.6500306899. The cubic root of 660523412 is about 870.8888665078. Note that the first 4 decimals are identical.

Adding to 660523412 its reverse (214325066), we get a palindrome (874848478).

The spelling of 660523412 in words is "six hundred sixty million, five hundred twenty-three thousand, four hundred twelve".