652661 has 4 divisors (see below), whose sum is σ = 656172. Its totient is φ = 649152.

The previous prime is 652657. The next prime is 652667. The reversal of 652661 is 166256.

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

It can be written as a sum of positive squares in 2 ways, for example, as 624100 + 28561 = 790^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 652661 - 2² = 652657 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 652661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460 + ... + 1853.

It is an arithmetic number, because the mean of its divisors is an integer number (164043).

2⁶⁵²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

652661 is a deficient number, since it is larger than the sum of its proper divisors (3511).

652661 is a wasteful number, since it uses less digits than its factorization.

652661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510.

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

The square root of 652661 is about 807.8743714217. The cubic root of 652661 is about 86.7419579121.

The spelling of 652661 in words is "six hundred fifty-two thousand, six hundred sixty-one".