1677167161 has 4 divisors (see below), whose sum is σ = 1678157172. Its totient is φ = 1676177152.

The previous prime is 1677167143. The next prime is 1677167201. The reversal of 1677167161 is 1617617761.

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

It can be written as a sum of positive squares in 2 ways, for example, as 736579600 + 940587561 = 27140^2 + 30669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1677167161 - 2⁹ = 1677166649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1677167111) 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, 492460 + ... + 495853.

It is an arithmetic number, because the mean of its divisors is an integer number (419539293).

Almost surely, 2^1677167161 is an apocalyptic number.

It is an amenable number.

1677167161 is a deficient number, since it is larger than the sum of its proper divisors (990011).

1677167161 is an equidigital number, since it uses as much as digits as its factorization.

1677167161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990010.

The product of its digits is 74088, while the sum is 43.

The square root of 1677167161 is about 40953.2313865463. The cubic root of 1677167161 is about 1188.1158331300.

The spelling of 1677167161 in words is "one billion, six hundred seventy-seven million, one hundred sixty-seven thousand, one hundred sixty-one".