6614731561 has 3 divisors (see below), whose sum is σ = 6614812893. Its totient is φ = 6614650230.

The previous prime is 6614731531. The next prime is 6614731567. The reversal of 6614731561 is 1651374166.

The square root of 6614731561 is 81331.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 6614731561 - 2⁹ = 6614731049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6614731567) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40666 + ... + 121996.

It is an arithmetic number, because the mean of its divisors is an integer number (2204937631).

Almost surely, 2^6614731561 is an apocalyptic number.

6614731561 is the 81331-st square number.

6614731561 is the 40666-th centered octagonal number.

It is an amenable number.

6614731561 is a deficient number, since it is larger than the sum of its proper divisors (81332).

6614731561 is an frugal number, since it uses more digits than its factorization.

6614731561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162662 (or 81331 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The cubic root of 6614731561 is about 1877.1720309179.

The spelling of 6614731561 in words is "six billion, six hundred fourteen million, seven hundred thirty-one thousand, five hundred sixty-one".