660561627 has 12 divisors (see below), whose sum is σ = 968096360. Its totient is φ = 400340160.

The previous prime is 660561617. The next prime is 660561647. The reversal of 660561627 is 726165066.

It is not a de Polignac number, because 660561627 - 2¹¹ = 660559579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660561617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 909502 + ... + 910227.

Almost surely, 2^660561627 is an apocalyptic number.

660561627 is a deficient number, since it is larger than the sum of its proper divisors (307534733).

660561627 is a wasteful number, since it uses less digits than its factorization.

660561627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819754 (or 1819743 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 660561627 is about 25701.3934836226. The cubic root of 660561627 is about 870.9056614594.

The spelling of 660561627 in words is "six hundred sixty million, five hundred sixty-one thousand, six hundred twenty-seven".