526661 has 8 divisors (see below), whose sum is σ = 565920. Its totient is φ = 488592.

The previous prime is 526657. The next prime is 526667. The reversal of 526661 is 166625.

526661 = 11² + 12² + ... + 116².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 526661 - 2² = 526657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 526661.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (70740).

2⁵²⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

526661 is a deficient number, since it is larger than the sum of its proper divisors (39259).

526661 is a wasteful number, since it uses less digits than its factorization.

526661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595.

The product of its digits is 2160, while the sum is 26.

The square root of 526661 is about 725.7141310461. The cubic root of 526661 is about 80.7564190854.

The spelling of 526661 in words is "five hundred twenty-six thousand, six hundred sixty-one".