660681050 has 24 divisors (see below), whose sum is σ = 1231645500. Its totient is φ = 263674880.

The previous prime is 660681031. The next prime is 660681059. The reversal of 660681050 is 50186066.

It can be written as a sum of positive squares in 6 ways, for example, as 441966529 + 218714521 = 21023^2 + 14789^2 .

It is a junction number, because it is equal to n+sod(n) for n = 660680998 and 660681016.

It is not an unprimeable number, because it can be changed into a prime (660681059) 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, 7736 + ... + 37164.

Almost surely, 2^660681050 is an apocalyptic number.

660681050 is a deficient number, since it is larger than the sum of its proper divisors (570964450).

660681050 is a wasteful number, since it uses less digits than its factorization.

660681050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29890 (or 29885 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 660681050 is about 25703.7166573241. The cubic root of 660681050 is about 870.9581420030.

The spelling of 660681050 in words is "six hundred sixty million, six hundred eighty-one thousand, fifty".