513666 has 12 divisors (see below), whose sum is σ = 1112982. Its totient is φ = 171216.

The previous prime is 513649. The next prime is 513673. The reversal of 513666 is 666315.

It can be written as a sum of positive squares in only one way, i.e., 497025 + 16641 = 705^2 + 129^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 513666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14251 + ... + 14286.

2⁵¹³⁶⁶⁶ is an apocalyptic number.

513666 is an abundant number, since it is smaller than the sum of its proper divisors (599316).

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

513666 is a wasteful number, since it uses less digits than its factorization.

513666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28545 (or 28542 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 513666 is about 716.7049602172. The cubic root of 513666 is about 80.0866768884.

It can be divided in two parts, 51 and 3666, that multiplied together give a triangular number (186966 = T₆₁₁).

The spelling of 513666 in words is "five hundred thirteen thousand, six hundred sixty-six".