526663 has 4 divisors (see below), whose sum is σ = 528808. Its totient is φ = 524520.

The previous prime is 526657. The next prime is 526667. The reversal of 526663 is 366625.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 526663 - 2¹³ = 518471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (526667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (132202).

2⁵²⁶⁶⁶³ is an apocalyptic number.

526663 is a deficient number, since it is larger than the sum of its proper divisors (2145).

526663 is a wasteful number, since it uses less digits than its factorization.

526663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144.

The product of its digits is 6480, while the sum is 28.

The square root of 526663 is about 725.7155089978. The cubic root of 526663 is about 80.7565213097.

It can be divided in two parts, 5266 and 63, that added together give a square (5329 = 73²).

The spelling of 526663 in words is "five hundred twenty-six thousand, six hundred sixty-three".