6652561 has 4 divisors (see below), whose sum is σ = 6695092. Its totient is φ = 6610032.

The previous prime is 6652553. The next prime is 6652579. The reversal of 6652561 is 1652566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652566 = 2 ⋅826283.

It can be written as a sum of positive squares in 2 ways, for example, as 1040400 + 5612161 = 1020^2 + 2369^2 .

It is a cyclic number.

It is not a de Polignac number, because 6652561 - 2³ = 6652553 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 (6652501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21030 + ... + 21343.

It is an arithmetic number, because the mean of its divisors is an integer number (1673773).

Almost surely, 2^6652561 is an apocalyptic number.

It is an amenable number.

6652561 is a deficient number, since it is larger than the sum of its proper divisors (42531).

6652561 is a wasteful number, since it uses less digits than its factorization.

6652561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42530.

The product of its digits is 10800, while the sum is 31.

The square root of 6652561 is about 2579.2559004488. The cubic root of 6652561 is about 188.0743726417.

The spelling of 6652561 in words is "six million, six hundred fifty-two thousand, five hundred sixty-one".