1667131165 has 24 divisors (see below), whose sum is σ = 2371106520. Its totient is φ = 1121597568.

The previous prime is 1667131157. The next prime is 1667131171. The reversal of 1667131165 is 5611317661.

It can be written as a sum of positive squares in 4 ways, for example, as 836192889 + 830938276 = 28917^2 + 28826^2 .

It is not a de Polignac number, because 1667131165 - 2³ = 1667131157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51210 + ... + 77179.

It is an arithmetic number, because the mean of its divisors is an integer number (98796105).

Almost surely, 2^1667131165 is an apocalyptic number.

It is an amenable number.

1667131165 is a deficient number, since it is larger than the sum of its proper divisors (703975355).

1667131165 is a wasteful number, since it uses less digits than its factorization.

1667131165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128461 (or 128454 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 1667131165 is about 40830.5175695827. The cubic root of 1667131165 is about 1185.7412360000.

The spelling of 1667131165 in words is "one billion, six hundred sixty-seven million, one hundred thirty-one thousand, one hundred sixty-five".