6745727161 has 4 divisors (see below), whose sum is σ = 6745989712. Its totient is φ = 6745464612.

The previous prime is 6745727147. The next prime is 6745727167. The reversal of 6745727161 is 1617275476.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6745727161 - 2²¹ = 6743630009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6745727167) 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, 87975 + ... + 145708.

It is an arithmetic number, because the mean of its divisors is an integer number (1686497428).

Almost surely, 2^6745727161 is an apocalyptic number.

It is an amenable number.

6745727161 is a deficient number, since it is larger than the sum of its proper divisors (262551).

6745727161 is a wasteful number, since it uses less digits than its factorization.

6745727161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262550.

The product of its digits is 493920, while the sum is 46.

The square root of 6745727161 is about 82132.3758392511. The cubic root of 6745727161 is about 1889.4827173513.

The spelling of 6745727161 in words is "six billion, seven hundred forty-five million, seven hundred twenty-seven thousand, one hundred sixty-one".