6561158 has 4 divisors (see below), whose sum is σ = 9841740. Its totient is φ = 3280578.

The previous prime is 6561151. The next prime is 6561161. The reversal of 6561158 is 8511656.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640288 + ... + 1640291.

It is an arithmetic number, because the mean of its divisors is an integer number (2460435).

Almost surely, 2^6561158 is an apocalyptic number.

6561158 is a deficient number, since it is larger than the sum of its proper divisors (3280582).

6561158 is a wasteful number, since it uses less digits than its factorization.

6561158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280581.

The product of its digits is 7200, while the sum is 32.

The square root of 6561158 is about 2561.4757465180. The cubic root of 6561158 is about 187.2090468209.

The spelling of 6561158 in words is "six million, five hundred sixty-one thousand, one hundred fifty-eight".