6561332 has 6 divisors (see below), whose sum is σ = 11482338. Its totient is φ = 3280664.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561332 is 2331656.

It can be written as a sum of positive squares in only one way, i.e., 6522916 + 38416 = 2554^2 + 196^2 .

It is a super-2 number, since 2×6561332² = 86102155228448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820163 + ... + 820170.

It is an arithmetic number, because the mean of its divisors is an integer number (1913723).

Almost surely, 2^6561332 is an apocalyptic number.

It is an amenable number.

6561332 is a deficient number, since it is larger than the sum of its proper divisors (4921006).

6561332 is a wasteful number, since it uses less digits than its factorization.

6561332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640337 (or 1640335 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 6561332 is about 2561.5097110884. The cubic root of 6561332 is about 187.2107017161.

Adding to 6561332 its reverse (2331656), we get a palindrome (8892988).

The spelling of 6561332 in words is "six million, five hundred sixty-one thousand, three hundred thirty-two".